How it works
Prerequisites
- Necrotic Ooze does not have summoning sickness.
Steps
- 1Activate Necrotic Ooze by putting a -1/-1 counter on it, untapping it.
- 2Activate Necrotic Ooze by removing a -1/-1 counter from it, adding one mana of any color.
- 3Repeat.
Commander brackets
In which brackets is this combo allowed, per Spellbook's Exhibition tier?