Cauldron of Souls + Corridor Monitor + Ridgescale Tusker + Ashnod's Altar

Prerequisites

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Steps

1. 1Activate Cauldron of Souls by tapping it, giving Ridgescale Tusker and Corridor Monitor persist until end of turn.
2. 2Activate Ashnod's Altar by sacrificing Corridor Monitor, adding .
3. 3Corridor Monitor dies, triggering its persist ability, returning itself from your graveyard to the battlefield with a -1/-1 counter on it.
4. 4Corridor Monitor enters the battlefield, untapping Cauldron of Souls.
5. 5Activate Ashnod's Altar by sacrificing Ridgescale Tusker, adding .
6. 6Ridgescale Tusker dies, triggering its persist ability, returning itself from your graveyard to the battlefield with a -1/-1 counter on it.
7. 7Ridgescale Tusker enters the battlefield, putting a +1/+1 counter on each creature you control.
8. 8Repeat.

Effects

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