Agatha's Soul Cauldron + Walking Ballista + Strangleroot Geist

Prerequisites

• Strangleroot Geist has at least one +1/+1 counter on it.

Steps

1. 1Activate Strangleroot Geist using Walking Ballista's second ability by removing a +1/+1 counter from it.
2. 2Repeat step 1 until Strangleroot Geist has no +1/+1 counters on it.
3. 3Resolve all Strangleroot Geist abilities dealing 1 damage to Strangleroot Geist, and any remaining damage to any target(s).
4. 4Strangleroot Geist dies as a state-based action due to having 0 toughness.
5. 5Strangleroot Geist's undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
6. 6Repeat.

Effects

• Infinite death triggers
• Infinite ETB
• Infinite LTB