Commander Liara Portyr + Eternal Scourge + Ashnod's Altar + Rest in Peace

Prerequisites

• You control at least two creatures that can attack this turn.
• You have at least two opponents.

Steps

1. 1Declare at least two creatures you control as attackers, attacking at least two opponent.
2. 2Liara triggers, causing all spells you cast from exile this turn to cost at least less, and exiling at least two cards from the top of your library and allowing you to play them this turn.
3. 3Move to your post-combat main phase.
4. 4Activate Ashnod's Altar by sacrificing Eternal Scourge, adding .
5. 5Eternal Scourge is exiled instead of being put into your graveyard due to Rest in Peace.
6. 6Cast Eternal Scourge from exile by paying .
7. 7Repeat from step 4.

Effects

• Infinite colorless mana
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite storm count