Reaper King + Serra Avatar + Atla Palani, Nest Tender + Maskwood Nexus

Reaper King

Serra Avatar

Atla Palani, Nest Tender

Maskwood Nexus

How it works

1. Cause a creature to enter the battlefield under your control by any method.
2. When that creature enters the battlefield, Reaper King triggers, destroying that creature.
3. Resolve Atla Palani's trigger, revealing cards from the top of your library until you reveal a creature card and putting it onto the battlefield.
4. Repeat from step 2 until Serra Avatar enters the battlefield then dies, or until you choose to end the loop by destroying an opponent's permanent.
5. If Serra Avatar dies, it and Atla Palani trigger.
6. Resolve Serra Avatar's trigger, shuffling it into your library.
7. Continue from step 3.

Maskwood Nexus is the true linchpin of this mechanical marvel, applying all creature types—including Scarecrow and Egg—to every creature you own and control. This transformation means Atla Palani, Nest Tender turns every egg death into a cascading reveal that instantly summons your next creature, while Reaper King turns each new arrival into a vindicate-style trigger that immediately destroys a permanent. When Serra Avatar enters the fray, its massive power feeds the loop, and its built-in replacement effect ensures it shuffles right back into your library whenever it dies to keep the chain unbroken.