Ashnod's Altar + Intruder Alarm + Selvala, Heart of the Wilds + Sin, Unending Cataclysm

Mana needed: {5}{G}{G}{U} plus commander tax if applicable

GU identity

Commander legal

The 4 combo pieces

What must be in place

There are at least X counters on artifacts, creatures and/or enchantments you control, where X is 1 plus the number of times you've cast Sin from the command zone this game.

How to execute it

  1. Cast Sin either from your hand or command zone by paying {5}{G}{U} plus commander tax if applicable.
  2. As Sin enters, remove all counters from all artifacts, enchantments and creatures you control, putting twice that many +1/+1 counters on Sin.
  3. Activate Selvala by paying {G} and tapping it, adding at least {G}{G}{U} plus an additional {X} equal to Sin's power minus 3.
  4. When Sin enters, Intruder Alarm triggers, untapping all creatures.
  5. Activate Ashnod's Altar by sacrificing Sin, adding {C}{C}.
  6. Choose to return Sin to the command zone from your graveyard.
  7. When Sin dies, it triggers, putting its counters on Selvala.
  8. Repeat.

What the combo produces