Cast Sculpting Steel by paying .
Sculpting Steel enters the battlefield as a copy of Spine of Ish Sah.
Sculpting Steel enters the battlefield, destroying target permanent.
Activate Krark-Clan Ironworks by sacrifice Scultping Steel, adding .
Sculpting Steel triggers, returning to your hand.
Repeat.

You control at least seven artifacts.

Cast Spine of Ish Sah by paying due to Sami.
When Spine of Ish Sah enters, its first ability triggers, destroying itself.
Spine of Ish Sah's second ability triggers, returning it from your graveyard to your hand.
Repeat.

Viridian Joiner does not have summoning sickness.

Activate Viridian Joiner by tapping it, adding an amount of equal to its power.
Cast Spine of Ish Sah by paying .
Raggadragga's third ability triggers, giving Viridian Joiner +7/+7 until end of turn and untapping Viridian Joiner.
When Spine of Ish Sah enters the battlefield, its first ability triggers, destroying itself.
When Spine of Ish Sah leaves the battlefield, its second ability triggers, returning itself to your hand from your graveyard.
Repeat.

Activate Krark-Clan Ironworks by sacrificing Spine of Ish Sah, adding .
Spine of Ish Sah leaves the battlefield, returning itself from your graveyard to your hand.
Imotekh triggers, creating two 2/2 Necron Warrior artifact creature tokens.
Activate Krark-Clan Ironworks twice by sacrificing both Necron Warriors, adding .
Cast Spine of Ish Sah by paying .
Spine of Ish Sah enters the battlefield, destroying a permanent.
Repeat.
You may also repeat this loop during each of your turns.

"Artifact" chosen with Cloud Key.

Activate Krark-Clan Ironworks by sacrificing Spine of Ish Sah, adding .
Spine of Ish Sah leaves the battlefield, returning itself from your graveyard to your hand.
Imotekh triggers, creating two 2/2 Necron Warrior artifact creature tokens.
Activate Krark-Clan Ironworks twice by sacrificing both Necron Warriors, adding .
Cast Spine of Ish Sah by paying .
Spine of Ish Sah enters the battlefield, destroying a permanent.
Repeat.
You may also repeat this loop during each of your turns.

Priest of Yawgmoth does not have summoning sickness.

Activate Priest of Yawgmoth by tapping and sacrificing Spine of Ish Sah, adding seven .
Spine of Ish Sah triggers, returning itself from your graveyard to your hand.
Cast Spine of Ish Sah by paying .
Mirran Spy triggers, untapping Priest of Yawgmoth.
Spine of Ish Sah enters the battlefield, destroying target permanent.
Repeat.

Slobad does not have summoning sickness.

Activate Slobad by tapping it and sacrificing Spine of Ish Sah, adding seven that can only be spent to cast artifact spells or to activate abilities of artifacts.
Spine of Ish Sah leaves the battlefield, returning itself from your graveyard to your hand.
Cast Spine of Ish Sah by paying .
Sai triggers, creating a 1/1 Thopter artifact creature token.
The Thopter enters the battlefield, triggering Intruder Alarm, untapping all creatures.
Spine of Ish Sah enters the battlefield, destroying target permanent.
Repeat.

Slobad does not have summoning sickness.

Activate Slobad by tapping it and sacrificing Spine of Ish Sah, adding seven that can only be spent to cast artifact spells or to activate abilities of artifacts.
Spine of Ish Sah leaves the battlefield, returning itself from your graveyard to your hand.
Cast Spine of Ish Sah by paying .
Mirran Spy triggers, untapping Slobad.
Spine of Ish Sah enters the battlefield, destroying target permanent.
Repeat.

Slobad does not have summoning sickness.

Activate Slobad by tapping it and sacrificing Spine of Ish Sah, adding that can only be spent to cast artifact spells or to activate abilities of artifacts.
Spine of Ish Sah leaves the battlefield, returning itself from your graveyard to your hand.
Cast Spine of Ish Sah by paying .
Spine of Ish Sah enters the battlefield, triggering itself and Grinding Station.
Resolve the Spine of Ish Sah trigger, destroying target permanent.
Resolve the Grinding Station trigger, untapping it.
Activate Clock of Omens by tapping Grinding Station and Spine of Ish Sah, untapping Slobad.
Repeat.

Feldon does not have summoning sickness.

Activate Feldon by paying and tapping it, creating a token copy of Slobad with haste that is an artifact in addition to its other types.
Activate the Slobad token by tapping it and sacrificing Spine of Ish Sah, adding seven that can only be spent to cast artifact spells or to activate abilities of artifacts.
Spine of Ish Sah leaves the battlefield, returning itself from your graveyard to your hand.
Cast Spine of Ish Sah by paying .
Traxos triggers, untapping itself.
Spine of Ish Sah enters the battlefield, destroying target permanent.
Activate Clock of Omens by tapping Traxos and Spine of Ish Sah, untapping the Slobad token.
Repeat from step 2.

Sculpting Steel is a copy of Spine of Ish Sah.

Sacrifice Scultping Steel for .
Sculpting Steel goes to the graveyard as a copy of Spine of Ish Sah returning it to your hand.
Cast Sculpting Steel choosing to have it enter as a copy of Spine of Ish Sah destroying target Permanent.
Repeat.

Feldon does not have summoning sickness.

Activate Feldon by paying and tapping it, creating a token copy of Slobad with haste that is an artifact in addition to its other types.
Activate the Slobad token by tapping it and sacrificing Spine of Ish Sah, adding seven that can only be spent to cast artifact spells or to activate abilities of artifacts.
Spine of Ish Sah leaves the battlefield, returning itself from your graveyard to your hand.
Cast Spine of Ish Sah by paying .
Spine of Ish Sah enters the battlefield, triggering itself and Battered Golem.
Resolve the Spine of Ish Sah trigger, destroying target permanent.
Resolve the Battered Golem trigger, untapping it.
Activate Clock of Omens by tapping Battered Golem and Spine of Ish Sah, untapping the Slobad token.
Repeat from step 2.

Feldon does not have summoning sickness.

Activate Feldon by paying and tapping it, creating a token copy of Slobad with haste that is an artifact in addition to its other types.
Activate the Slobad token by tapping it and sacrificing Spine of Ish Sah, adding seven that can only be spent to cast artifact spells or to activate abilities of artifacts.
Spine of Ish Sah leaves the battlefield, returning itself from your graveyard to your hand.
Cast Spine of Ish Sah by paying .
Spine of Ish Sah enters the battlefield, triggering itself and Grinding Station.
Resolve the Spine of Ish Sah trigger, destroying target permanent.
Resolve the Grinding Station trigger, untapping it.
Activate Clock of Omens by tapping Grinding Station and Spine of Ish Sah, untapping the Slobad token.
Repeat from step 2.

Slobad does not have summoning sickness.

Activate Slobad by tapping it and sacrificing Spine of Ish Sah, adding that can only be spent to cast artifact spells or to activate abilities of artifacts.
Spine of Ish Sah leaves the battlefield, returning itself from your graveyard to your hand.
Cast Spine of Ish Sah by paying .
Traxos triggers, untapping itself.
Spine of Ish Sah enters the battlefield, destroying target permanent.
Activate Clock of Omens by tapping Traxos and Spine of Ish Sah, untapping Slobad.
Repeat.

Slobad does not have summoning sickness.

Activate Slobad by tapping it and sacrificing Spine of Ish Sah, adding that can only be spent to cast artifact spells or to activate abilities of artifacts.
Spine of Ish Sah leaves the battlefield, returning itself from your graveyard to your hand.
Cast Spine of Ish Sah by paying .
Spine of Ish Sah enters the battlefield, triggering itself and Battered Golem.
Resolve the Spine of Ish Sah trigger, destroying target permanent.
Resolve the Battered Golem trigger, untapping it.
Activate Clock of Omens by tapping Battered Golem and Spine of Ish Sah, untapping Slobad.
Repeat.

Slobad does not have summoning sickness.

Activate Slobad by tapping it and sacrificing Spine of Ish Sah, adding seven that can only be spent to cast artifact spells or to activate abilities of artifacts.
Spine of Ish Sah leaves the battlefield, returning itself from your graveyard to your hand.
Cast Spine of Ish Sah by paying .
Spine of Ish Sah enters the battlefield as a creature due to March of the Machines, triggering itself and Intruder Alarm.
Resolve the Intruder Alarm trigger, untapping all creatures.
Resolve the Spine of Ish Sah trigger, destroying target permanent.
Repeat.

"Artifact" chosen with Umori.

Activate Krark-Clan Ironworks by sacrificing Spine of Ish Sah, adding .
Spine of Ish Sah leaves the battlefield, returning itself from your graveyard to your hand.
Imotekh triggers, creating two 2/2 Necron Warrior artifact creature tokens.
Activate Krark-Clan Ironworks twice by sacrificing both Necron Warriors, adding .
Cast Spine of Ish Sah by paying .
Spine of Ish Sah enters the battlefield, destroying a permanent.
Repeat.
You may also repeat this loop during each of your turns.

Slobad does not have summoning sickness.

Activate Slobad by tapping it and sacrificing Spine of Ish Sah, adding that can only be spent to cast artifact spells or to activate abilities of artifacts.
Spine of Ish Sah leaves the battlefield, returning itself from your graveyard to your hand.
Cast Spine of Ish Sah by paying .
Spine of Ish Sah enters the battlefield, triggering itself and Grinding Station.
Resolve the Spine of Ish Sah trigger, destroying target permanent.
Resolve the Grinding Station trigger, untapping it.
Activate Clock of Omens by tapping Grinding Station and Spine of Ish Sah, untapping Slobad.
Repeat.

Slobad does not have summoning sickness.
"Mirran" chosen with Mirrodin Besieged.

Activate Slobad by tapping it and sacrificing Spine of Ish Sah, adding seven that can only be spent to cast artifact spells or to activate abilities of artifacts.
Spine of Ish Sah leaves the battlefield, returning itself from your graveyard to your hand.
Cast Spine of Ish Sah by paying .
Sai triggers, creating a 1/1 Myr artifact creature token.
The Myr enters the battlefield, triggering Intruder Alarm, untapping all creatures.
Spine of Ish Sah enters the battlefield, destroying target permanent.
Repeat.

Priest of Yawgmoth does not have summoning sickness.

Activate Priest of Yawgmoth by tapping and sacrificing Spine of Ish Sah, adding seven .
Spine of Ish Sah triggers, returning itself from your graveyard to your hand.
Cast Spine of Ish Sah by paying .
Paradox Engine triggers, untapping all nonland permanents you control.
Spine of Ish Sah enters the battlefield, destroying target permanent.
Repeat.

Slobad does not have summoning sickness.

Activate Slobad by tapping it and sacrificing Spine of Ish Sah, adding seven that can only be spent to cast artifact spells or to activate abilities of artifacts.
Spine of Ish Sah leaves the battlefield, returning itself from your graveyard to your hand.
Cast Spine of Ish Sah by paying .
Efficient Construction triggers, creating a 1/1 Thopter artifact creature token.
The Thopter enters the battlefield, triggering Intruder Alarm, untapping all creatures.
Spine of Ish Sah enters the battlefield, destroying target permanent.
Repeat.

Slobad does not have summoning sickness.

Activate Slobad by tapping it and sacrificing Spine of Ish Sah, adding seven that can only be spent to cast artifact spells or to activate abilities of artifacts.
Spine of Ish Sah leaves the battlefield, triggering itself and Summoning Station.
Resolve the Summoning Station trigger, untapping it.
Resolve the Spine of Ish Sah trigger, returning itself from your graveyard to your hand.
Activate Summoning Station by tapping it, creating a 2/2 Pincher creature token.
The Pincher enters the battlefield, triggering Intruder Alarm, untapping all creatures.
Cast Spine of Ish Sah by paying .
Spine of Ish Sah enters the battlefield, destroying target permanent.
Repeat.

Slobad does not have summoning sickness.

Activate Slobad by tapping it and sacrificing Spine of Ish Sah, adding that can only be spent to cast artifact spells or to activate abilities of artifacts.
Spine of Ish Sah leaves the battlefield, returning itself from your graveyard to your hand.
Cast Spine of Ish Sah by paying .
Traxos triggers, untapping itself.
Spine of Ish Sah enters the battlefield, destroying target permanent.
Activate Clock of Omens by tapping Traxos and Spine of Ish Sah, untapping Slobad.
Repeat.

Slobad does not have summoning sickness.

Activate Slobad by tapping it and sacrificing Spine of Ish Sah, adding that can only be spent to cast artifact spells or to activate abilities of artifacts.
Spine of Ish Sah leaves the battlefield, returning itself from your graveyard to your hand.
Cast Spine of Ish Sah by paying .
Spine of Ish Sah enters the battlefield, triggering itself and Battered Golem.
Resolve the Spine of Ish Sah trigger, destroying target permanent.
Resolve the Battered Golem trigger, untapping it.
Activate Clock of Omens by tapping Battered Golem and Spine of Ish Sah, untapping Slobad.
Repeat.

Slobad does not have summoning sickness.

Activate Slobad by tapping it and sacrificing Spine of Ish Sah, adding seven that can only be spent to cast artifact spells or to activate abilities of artifacts.
Spine of Ish Sah leaves the battlefield, returning itself from your graveyard to your hand.
Cast Spine of Ish Sah by paying .
Alela triggers, creating a 1/1 Faerie creature token.
The Faerie enters the battlefield, triggering Intruder Alarm, untapping all creatures.
Spine of Ish Sah enters the battlefield, destroying target permanent.
Repeat.