Verdant Succession + Mortuary + Yahenni, Undying Partisan

Verdant Succession

Mortuary

Yahenni, Undying Partisan

How it works

1. Activate Yahenni by sacrificing a green nontoken creature.
2. When the creature dies, Verdant Succession and Mortuary trigger.
3. Resolve the Mortuary trigger, putting the creature on top of your library from your graveyard.
4. Resolve the Verdant Succession trigger, returning the creature from your library to the battlefield.
5. Resolve the Yahenni ability.
6. Repeat.

This loop turns Yahenni, Undying Partisan into an endless sacrifice engine for your green nontoken creatures. Whenever you feed a green creature to Yahenni, Mortuary immediately intercepts it from the graveyard to place it neatly back on top of your library, exactly where Verdant Succession needs it to be in order to search it straight back onto the battlefield. Because both triggers fire simultaneously upon death, you stack them to effortlessly recycle the same creature over and over again, fueling endless death and sacrifice triggers while growing Yahenni's power indefinitely.