Rafiq of the Many + Colossus Hammer

Prerequisites

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

Steps

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