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

The Watcher in the Water

Wylie Duke, Atiin Hero

Heart of Kiran

Bartolomé del Presidio

Rukarumel, Biologist

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 is held together by Rukarumel, Biologist, whose passive type-granting ability ensures your nontoken creatures share every identity, though here she primarily sets the stage while your active engines take over. By tapping Wylie Duke, Atiin Hero to crew Heart of Kiran without paying its usual crew cost, you trigger Wylie Duke to draw a card and gain life, which in turn causes The Watcher in the Water to spawn a 1/1 Tentacle token. You then feed that newly created Tentacle to Bartolomé del Presidio, and the creature's death triggers The Watcher in the Water's second ability to untap Wylie Duke so the whole cycle can begin anew.