Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Ashnod's Altar + Slurrk, All-Ingesting

Prerequisites

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Steps

1. 1Activate Ashnod's Altar by sacrificing Slurrk.
2. 2When Slurrk dies, its innate ability and persist ability trigger.
3. 3Resolve Slurrk's innate ability, putting a +1/+1 counter on each creature you control that already has a +1/+1 counter on it.
4. 4Resolve Slurrk's persist ability, returning it from your graveyard to the battlefield with four +1/+1 counters on it due to its replacement effect.
5. 5Repeat.

Effects

• Infinite +1/+1 counters on certain creatures
• Infinite colorless mana
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers