Endling + Necrotic Ooze + Phyrexian Altar + Walking Ballista

Mana needed: {B}

B identity

Commander legal

The 4 combo pieces

How to execute it

  1. Activate Necrotic Ooze using Endling's third ability by paying {B}, giving Necrotic Ooze undying until end of turn.
  2. If Necrotic Ooze has any +1/+1 counters, activate it using Walking Ballista's second ability by removing a +1/+1 counter from it, dealing 1 damage to any target.
  3. Repeat step 2 until Necrotic Ooze has no +1/+1 counters.
  4. Activate Phyrexian Altar by sacrificing Necrotic Ooze, adding {B}.
  5. Necrotic Ooze dies, triggering its undying ability, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
  6. Repeat.

What the combo produces