Ghave has at least two +1/+1 counters on it.

Activate Ghave's first ability by paying and removing a +1/+1 counter from it, creating a 1/1 Saproling creature token.
Activate Ashnod's Altar by sacrificing the Saproling, adding .
When the Saproling dies, Death's Presence triggers, putting a +1/+1 counter on Ghave.
Repeat.

You control at least one additional creature.

Activate Ashnod's Altar by sacrificing any other creature, adding .
Death's Presece triggers, putting a number of +1/+1 counters on Scurry Oak equal to the sacrificed creature's power.
Scurry Oak triggers, creating a 1/1 Squirrel creature token.
Repeat.

A creature you control has at least one +1/+1 counter on it.

Activate Ghave's first ability by paying and removing a +1/+1 counter from it, creating a 1/1 Saproling creature token.
Activate Utopia Mycon's second ability by sacrificing the Saproling, adding .
When the Saproling dies, Death's Presence triggers, putting a +1/+1 counter on Ghave.
Repeat.

You control at least one additional creature.

Activate Ashnod's Altar by sacrificing any other creature, adding .
Death's Presece triggers, putting a number of +1/+1 counters on Herd Baloth equal to the sacrificed creature's power.
Herd Baloth triggers, creating a 4/4 Beast creature token.
Repeat.

You control at least two creatures, one of which must have a power of one or greater.

Activate Ashnod's Altar by sacrificing any creature with power one or greater, adding .
Death's Presece triggers, putting a number of +1/+1 counters on any creature you control equal to the sacrificed creature's power.
Animation Module triggers, causing you to pay to create a 1/1 Servo artifact creature token.
Repeat.

You control at least one additional creature.

Activate Phyrexian Altar by sacrificing any other creature, adding one mana of any color.
Death's Presece triggers, putting a number of +1/+1 counters on Scurry Oak equal to the sacrificed creature's power.
Scurry Oak triggers, creating a 1/1 Squirrel creature token.
Repeat.

A creature you control has at least one +1/+1 counter on it.

Activate Ghave's first ability by paying and removing a +1/+1 counter from it, creating a 1/1 Saproling creature token.
Activate Phyrexian Altar by sacrificing the Saproling, adding .
When the Saproling dies, Death's Presence triggers, putting a +1/+1 counter on Ghave.
Repeat.

Ulasht has at least two +1/+1 counters on it.

Activate Ulasht's first ability by paying and removing a +1/+1 counter from it, creating a 1/1 Saproling creature token.
Activate Ashnod's Altar by sacrificing the Saproling, adding .
When the Saproling dies, Death's Presence triggers, putting a +1/+1 counter on Ulasht.
Repeat.

Ulasht has at least two +1/+1 counters on it.

Activate Ulasht's first ability by paying and removing a +1/+1 counter from it, creating a 1/1 Saproling creature token.
Activate Utopia Mycon's second ability by sacrificing the Saproling, adding .
When the Saproling dies, Death's Presence triggers, putting a +1/+1 counter on Ulasht.
Repeat.

You control at least one additional creature.

Activate Altar of Dementia by sacrificing any other creature.
Death's Presece triggers, putting a number of +1/+1 counters on Scurry Oak equal to the sacrificed creature's power.
Scurry Oak triggers, creating a 4/4 Beast creature token.
Resolve the Altar of Dementia ability, causing target player to mill cards equal to the sacrificed creature's power.
Repeat.

You control at least one additional creature.

Activate Phyrexian Altar by sacrificing any other creature, adding one mana of any color.
Death's Presece triggers, putting a number of +1/+1 counters on Herd Baloth equal to the sacrificed creature's power.
Herd Baloth triggers, creating a 4/4 Beast creature token.
Repeat.

You control at least two creatures, one of which must have a power of one or greater.

Activate Phyrexian Altar by sacrificing any creature with power one or greater, adding one mana of any color.
Death's Presece triggers, putting a number of +1/+1 counters on any creature you control equal to the sacrificed creature's power.
Animation Module triggers, causing you to pay to create a 1/1 Servo artifact creature token.
Repeat.

You control at least one additional creature.

Activate Altar of Dementia by sacrificing any other creature.
Death's Presece triggers, putting a number of +1/+1 counters on Herd Baloth equal to the sacrificed creature's power.
Herd Baloth triggers, creating a 1/1 Squirrel creature token.
Resolve the Altar of Dementia ability, causing target player to mill cards equal to the sacrificed creature's power.
Repeat.

You control at least one additional creature.

Activate Goblin Bombardment by sacrificing any other creature.
When the creature dies, Death's Presece triggers, putting a number of +1/+1 counters on Scurry Oak equal to the sacrificed creature's power.
Scurry Oak triggers, creating a 4/4 Beast creature token.
Resolve the Goblin Bombardment ability, dealing 1 damage to any target.
Repeat.

Marath has at least two +1/+1 counters on it.

Activate Marath by paying and removing a +1/+1 counter from it, creating a 1/1 Elemental creature token.
Activate Ashnod's Altar by sacrificing the Elemental, adding .
When the Elemental dies, Death's Presence triggers, putting a +1/+1 counter on Marath.
Repeat.

Ulasht has at least two +1/+1 counters on it.

Activate Ulasht's first ability by paying and removing a +1/+1 counter from it, creating a 1/1 Saproling creature token.
Activate Thermopod's second ability by sacrificing the Saproling, adding .
When the Saproling dies, Death's Presence triggers, putting a +1/+1 counter on Ulasht.
Repeat.

Ulasht has at least two +1/+1 counters on it.

Activate Ulasht's first ability by paying and removing a +1/+1 counter from it, creating a 1/1 Saproling creature token.
Activate Phyrexian Altar by sacrificing the Saproling, adding .
When the Saproling dies, Death's Presence triggers, putting a +1/+1 counter on Ulasht.
Repeat.

Pentavus has at least two +1/+1 counters on it.

Activate Pentavus's first ability by paying and removing a +1/+1 counter from it, creating a 1/1 Pentavite artifact creature token.
Activate Ashnod's Altar by sacrificing the Pentavite, adding .
When the Pentavite dies, Death's Presence triggers, putting a +1/+1 counter on Pentavus.
Repeat.

You control at least two creatures, one of which must be an artifact creature and have a power of one or greater.

Activate Krark-Clan Ironworks by sacrificing any artifact creature with power one or greater, adding .
Death's Presece triggers, putting a number of +1/+1 counters on any creature you control equal to the sacrificed creature's power.
Animation Module triggers, causing you to pay to create a 1/1 Servo artifact creature token.
Repeat.

Pentavus has at least two +1/+1 counters on it.

Activate Pentavus's first ability by paying and removing a +1/+1 counter from it, creating a 1/1 Pentavite artifact creature token.
Activate Phyrexian Altar by sacrificing the Pentavite, adding .
When the Pentavite dies, Death's Presence triggers, putting a +1/+1 counter on Pentavus.
Repeat.

Thopter Squadron has at least two +1/+1 counters on it.

Activate Thopter Squadron's first ability by paying and removing a +1/+1 counter from it, creating a 1/1 Thopter artifact creature token.
Activate Ashnod's Altar by sacrificing the Thopter, adding .
When the Thopter dies, Death's Presence triggers, putting a +1/+1 counter on Thopter Squadron.
Repeat.

Marath has at least two +1/+1 counters on it.

Activate Marath by paying and removing a +1/+1 counter from it, creating a 1/1 Elemental creature token.
Activate Phyrexian Altar by sacrificing the Elemental, adding .
When the Elemental dies, Death's Presence triggers, putting a +1/+1 counter on Marath.
Repeat.

Thopter Squadron has at least two +1/+1 counters on it.

Activate Thopter Squadron's first ability by paying and removing a +1/+1 counter from it, creating a 1/1 Thopter artifact creature token.
Activate Phyrexian Altar by sacrificing the Thopter, adding .
When the Thopter dies, Death's Presence triggers, putting a +1/+1 counter on Thopter Squadron.
Repeat.

Triskelavus has at least two +1/+1 counters on it.

Activate Triskelavus by paying and removing a +1/+1 counter from it, creating a 1/1 Triskelavite artifact creature token.
Activate Ashnod's Altar by sacrificing the Triskelavite, adding .
When the Triskelavite dies, Death's Presence triggers, putting a +1/+1 counter on Triskelavus.
Repeat.
Once you have infinite mana, you may instead sacrifice the Triskelavite using its own ability to deal infinite damage to any target(s).

Spike Breeder has at least two +1/+1 counters on it.

Activate Spike Breeder's second ability by paying and removing a +1/+1 counter from it, creating a 1/1 Spike creature token.
Activate Ashnod's Altar by sacrificing the Spike, adding .
When the Spike dies, Death's Presence triggers, putting a +1/+1 counter on Spike Breeder.
Repeat.

Marath has at least two +1/+1 counters on it.

Activate Marath by paying and removing a +1/+1 counter from it, creating a 1/1 Elemental creature token.
Activate Thermopod's second ability by sacrificing the Elemental, adding .
When the Elemental dies, Death's Presence triggers, putting a +1/+1 counter on Marath.
Repeat.

Thopter Squadron has at least two +1/+1 counters on it.

Activate Thopter Squadron's first ability by paying and removing a +1/+1 counter from it, creating a 1/1 Thopter artifact creature token.
Activate Krark-Clan ironworks by sacrificing the Thopter, adding .
When the Thopter dies, Death's Presence triggers, putting a +1/+1 counter on Thopter Squadron.
Repeat.

Triskelavus has at least two +1/+1 counters on it.

Activate Triskelavus by paying and removing a +1/+1 counter from it, creating a 1/1 Triskelavite artifact creature token.
Activate Phyrexian Altar by sacrificing the Triskelavite, adding .
When the Triskelavite dies, Death's Presence triggers, putting a +1/+1 counter on Triskelavus.
Repeat.

Pentavus has at least two +1/+1 counters on it.

Activate Pentavus's first ability by paying and removing a +1/+1 counter from it, creating a 1/1 Pentavite artifact creature token.
Activate Krark-Clan ironworks by sacrificing the Pentavite, adding .
When the Pentavite dies, Death's Presence triggers, putting a +1/+1 counter on Pentavus.
Repeat.

Triskelavus has at least two +1/+1 counters on it.

Activate Triskelavus by paying and removing a +1/+1 counter from it, creating a 1/1 Triskelavite artifact creature token.
Activate Krark-Clan ironworks by sacrificing the Triskelavite, adding .
When the Triskelavite dies, Death's Presence triggers, putting a +1/+1 counter on Triskelavus.
Repeat.
Once you have infinite mana, you may instead sacrifice the Triskelavite using its own ability to deal infinite damage to any target(s).

Activate Pentavus 3 times, removing 3 +1/+1 counters and creating 3 1/1 tokens.
Each of these tokens will enter with a vigilance counter.
Activate Tayam, removing the viglience counters, milling yourself 3 and reanimating a 3 mana value or less permanent.
Sacrifice all three 1/1s to Ashnod's Altar, generating .
Death's Presence triggers, putting 3 +1/+1 counters back on pentavus.