The Watcher in the Water, Wylie Duke, Atiin Hero, Heart of Kiran, Thermopod, and Arcane Adaptation

Prerequisites

• The Watcher in the Water on the battlefield
• Wylie Duke, Atiin Hero on the battlefield
• Heart of Kiran on the battlefield
• Thermopod on the battlefield
• Arcane Adaptation on the battlefield
• Wylie Duke does not have summoning sickness
• It is an opponent's turn

Steps

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 Thermopod's second ability by sacrificing the Tentacle
6. adding
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. Repeat

Results

• Infinite card draw
• Near-infinite lifegain
• Near-infinite lifegain triggers
• Near-infinite ETB
• Near-infinite LTB
• Near-infinite death triggers
• Near-infinite sacrifice triggers
• Near-infinite red mana
• Infinite draw triggers