The Watcher in the Water + Wylie Duke, Atiin Hero + Heart of Kiran + Viscera Seer + Rukarumel, Biologist

The Watcher in the Water

Wylie Duke, Atiin Hero

Heart of Kiran

Viscera Seer

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 Viscera Seer 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 Viscera Seer ability
8. Repeat.

By leveraging Rukarumel, Biologist to make your nontoken creatures Slivers, you set the stage to loop Wylie Duke, Atiin Hero's tap ability using Heart of Kiran as an efficient vehicle cost. Tapping Wylie Duke draws you a card during your opponent's turn, which instantly triggers The Watcher in the Water to create a Tentacle token. You can then sacrifice that token to Viscera Seer, whose death triggers The Watcher in the Water once more to untap Wylie Duke and keep the entire engine spinning infinitely.