Thran Vigil + Glen Elendra Archmage + Yahenni, Undying Partisan

Prerequisites

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Steps

1. 1Activate Yahenni by sacrificing Glen Elendra Archmage.
2. 2When Glen Elendra Archmage dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. 3Thran Vigil triggers, putting a +1/+1 counter on Glen Elendra Archmage.
4. 4Resolve the Yahenni ability.
5. 5Repeat.

Effects

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