The Watcher in the Water + Wylie Duke, Atiin Hero + Heart of Kiran + Arcane Adaptation + Bartolomé del Presidio

The Watcher in the Water

Wylie Duke, Atiin Hero

Heart of Kiran

Arcane Adaptation

Bartolomé del Presidio

How it works

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

This intricate loop centers around Arcane Adaptation naming "Kraken," which allows Heart of Kiran to alternative-cost its crew requirement using Wylie Duke, Atiin Hero while simultaneously letting The Watcher in the Water recognize your newly spawned Tentacle tokens as Krakens. Tapping Wylie Duke triggers its draw ability to feed The Watcher in the Water, netting you a Tentacle token while gaining life. You then feed that token to Bartolomé del Presidio, which triggers The Watcher in the Water's second ability to untap Wylie Duke—resetting the entire engine for infinite card draw, lifegain, and sacrifice triggers.