Yarus, Roar of the Old Gods + Cryptolith Rite + Obscuring Aether + Phyrexian Altar

Prerequisites

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Steps

1. 1Activate Obscuring Aether by paying , turning it face-down as a 2/2 creature.
2. 2Activate Obscuring Aether by tapping it, adding .
3. 3Activate Phyrexian Altar by sacrificing Obscuring Aether, adding .
4. 4When Obscuring Aether dies, Yarus' second ability triggers, returning it from your graveyard to the battlefield face-down, then turning it face-up.
5. 5Repeat.

Effects

• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers