Colossus Hammer attached to your commander.
Your commander does not have summoning sickness, and cannot be blocked by an opponent.

Declare your commander as an attacker.
Rafiq's first and second abilities trigger.
Resolve the first Rafiq trigger, giving your commander +1/+1 until end of turn.
Resolve the second Rafiq trigger, giving your commander double strike until end of turn.
Deal combat damage to an opponent using your commander, causing at least twenty-two damage to be dealt.
The opponent loses the game due to being dealt twenty-one or more damage by your commander.

Colossus Hammer and Belt of Giant Strength attached to the same creature you control.

At the beginning of your upkeep, Mayael's Aria triggers, putting a +1/+1 counter on each creature you control, causing you to gain ten life and win the game.

Eldrazi Conscription and Colossus Hammer attached to the same creature.

At the beginning of your upkeep, Mayael's Aria triggers, causing you to put a +1/+1 counter on each creature you control, gain ten life and win the game.

You control at least 3 artifacts.

Pay to equip Luminous Broodmoth with Colossus Hammer.
Sacrifice Luminous Broodmoth to Altar of Dementia, milling target player 13.
Luminous Broodmoth triggers, returning itself to the battlefield with a flying counter.
Repeat.

You control at least 3 artifacts.

Pay to equip Luminous Broodmoth with Colossus Hammer.
Tap Blasting Station, sacrificing Luminous Broodmoth to deal 1 damage to any target.
Luminous Broodmoth triggers, returning itself to the battlefield with a flying counter.
Blasting Station triggers, untapping.
Repeat.

Your commander on the battlefield.
Colossus Hammer attached to your commander.

At the beginning of your upkeep, Mayael's Aria triggers, causing you to put a +1/+1 counter on each creature you control, gain ten life and win the game.

You have a way to cause another creature to enter the battlefield under your control.
Colossus Hammer attached to Master Biomancer.

Cause another creature to enter the battlefield under your control with at least 22 +1/+1 counters on it due to Master Biomancer.
Simic Ascendancy's second ability triggers, putting 22 growth counters on Simic Ascendancy.
At the beginning of your next upkeep, Simic Ascendancy's third ability triggers, causing you to win the game.

Colossus Hammer and Burning Anger attached to Vessel of the All-Consuming.
Vessel of the All Consuming does not have summoning sickness.

Activate Vessel of the All-Consuming by tapping it, dealing at least thirteen damage to any opponent.
Vessel of the All-Consuming's first and second ability trigger.
Resolve Vessel of the All-Consuming's first trigger, putting a +1/+1 counter on it.
Resolve Vessel of the All-Consuming's second trigger, causing that opponent to lose the game.

You have a way to cause another creature to enter the battlefield under your control.
Belt of Giant Strength and Colossus Hammer attached to Master Biomancer.

Cause another creature to enter the battlefield under your control with at least 20 +1/+1 counters on it due to Master Biomancer.
Simic Ascendancy's second ability triggers, putting 20 growth counters on Simic Ascendancy.
At the beginning of your next upkeep, Simic Ascendancy's third ability triggers, causing you to win the game.