The Watcher in the Water + Wylie Duke, Atiin Hero + Heart of Kiran + Umbral Collar Zealot + Amoeboid Changeling

The Watcher in the Water

Wylie Duke, Atiin Hero

Heart of Kiran

Umbral Collar Zealot

Amoeboid Changeling

How it works

1. During an opponent's turn, activate Amoeboid Changeling by tapping it, causing Wylie Duke to become a Kraken until end of turn.
2. Activate Heart of Kiran by tapping Wylie Duke.
3. Wylie Duke triggers, causing you to draw a card and gain 1 life.
4. The Watcher's first ability triggers, creating a 1/1 Tentacle creature token.
5. Resolve the Heart of Kiran ability, causing it to become a creature until end of turn.
6. Activate Umbral Collar Zealot by sacrificing the Tentacle.
7. When the Tentacle dies, The Watcher's second ability triggers, untapping Wylie Duke and putting a stun counter on up to one permanent.
8. Resolve the Umbral Collar Zealot ability
9. Repeat from step 2.

This fascinating loop turns Wylie Duke, Atiin Hero into an engine for infinite card draw and lifegain by leveraging Amoeboid Changeling to temporarily make him a Kraken. Once he has that creature type, tapping Wylie Duke to crew Heart of Kiran triggers his ability to draw a card and gain life, which in turn causes The Watcher in the Water to generate a Tentacle token on an opponent's turn. You can then sacrifice that Tentacle to Umbral Collar Zealot, triggering The Watcher's second ability to untap Wylie Duke and place a stun counter while also setting up your next draw via surveil.