Tribute to the World Tree, and Aerie Ouphes

Prerequisites

• Tribute to the World Tree on the battlefield
• Aerie Ouphes on the battlefield
• A player controls a creature with flying
• Aerie Ouphes does not have a -1/-1 counter on it

Steps

1. Activate Aerie Ouphes by sacrificing it, targeting a creature with flying
2. When Aerie Ouphes dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
3. When Aerie Ouphes enters the battlefield, Tribute to the World Tree triggers, putting two +1/+1 counters on Aerie Ouphes
4. Repeat

Results

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