Yarus, Roar of the Old Gods + Cryptolith Rite + Obscuring Aether + Phyrexian Altar
Yarus, Roar of the Old Gods
Cryptolith Rite
Obscuring Aether
Phyrexian Altar
Requires
Yarus, Roar of the Old Gods must be on the battlefield.
Cryptolith Rite must be on the battlefield.
Obscuring Aether must be on the battlefield.
Phyrexian Altar must be on the battlefield.
Mana needed: 
Steps
- Activate Obscuring Aether by paying , turning it face-down as a 2/2 creature.
- Activate Obscuring Aether by tapping it, adding .
- Activate Phyrexian Altar by sacrificing Obscuring Aether, adding .
- When Obscuring Aether dies, Yarus' second ability triggers, returning it from your graveyard to the battlefield face-down, then turning it face-up.
- Repeat.
Results
Infinite death triggers. Infinite ETB. Infinite LTB. Infinite sacrifice triggers. Permanent allowing Creatures to Tap for Mana.
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