Adarkar Valkyrie + Thornbite Staff + Bartolomé del Presidio

Adarkar Valkyrie

Thornbite Staff

Bartolomé del Presidio

How it works

1. Activate Adarkar Valkyrie by tapping it, targeting another nontoken creature you control.
2. Activate Bartolomé del Presidio by sacrificing the creature targeted in step 1.
3. When the creature dies, Adarkar Valkyrie triggers twice.
4. Resolve the first trigger, untapping Adarkar Valkyrie.
5. Resolve the second trigger, returning the sacrificed creature from your graveyard to the battlefield.
6. Resolve the Bartolomé del Presidio ability, putting a +1/+1 counter on it.
7. Repeat.

This loop relies on Adarkar Valkyrie's ability to mark a creature for resurrection, which is cleanly triggered when Bartolomé del Presidio sacrifices that creature to grow larger. Because Adarkar Valkyrie's delayed trigger fires multiple times upon the creature's death, it not only brings the sacrificed creature straight back to the battlefield, but also provides the untap necessary to reset the process for another iteration. While Thornbite Staff is part of the package, the core engine effortlessly recycles your creatures over and over to generate infinite death triggers, enter-the-battlefield effects, and a massively pumped Bartolomé del Presidio.