Phyrexian Altar + The Watcher in the Water Combos

9 known combos featuring both cards in Commander

Infinite card draw Infinite draw triggers Near-infinite death triggers Near-infinite ETB Near-infinite LTB

Combo 1 with Symmetry Matrix

Also requires: Symmetry Matrix Symmetry Matrix
Results: Infinite card draw · Infinite draw triggers · Near-infinite death triggers · Near-infinite ETB · Near-infinite LTB · Near-infinite sacrifice triggers · Near-infinite untap of some creatures you control
Steps
  1. Draw a card during an opponent's turn.
  2. The Watcher's first ability riggers, creating a 1/1 Tentacle creature token.
  3. When the Tentacle enters the battlefield, Symmetry Matrix triggers.
  4. Holding priority, activate Phyrexian Altar by sacrificing the Tentacle, adding {1}.
  5. When the Tentacle dies, The Watcher's second ability triggers, untapping up to one Kraken you control.
  6. Resolve the Symmetry Matrix trigger, causing you to pay {1} to draw a card.
  7. Repeat from step 2.

Combo 2 with Kels, Fight Fixer

Also requires: Kels, Fight Fixer Kels, Fight Fixer
Results: Infinite card draw · Infinite draw triggers · Near-infinite death triggers · Near-infinite ETB · Near-infinite LTB · Near-infinite sacrifice triggers · Near-infinite untap of some creatures you control
Show steps
  1. During an opponent's turn, activate Phyrexian Altar by sacrificing another creature, adding {U/B}.
  2. Kels triggers, and The Watcher in the Water's second ability triggers if the sacrificed creature was a Tentacle.
  3. Resolve the Watcher in the Water trigger, if applicable, untapping up to one Kraken and putting a stun counter on up to one permanent.
  4. Resolve the Kels trigger, causing you to pay {U/B} to draw a card.
  5. The Watcher in the Water's first ability triggers, creating a 1/1 Tentacle creature token.
  6. Repeat.

Combo 3 with Skullclamp + Leonin Shikari

Results: Infinite card draw · Near-infinite ETB · Infinite draw triggers · Near-infinite LTB · Near-infinite death triggers · Near-infinite sacrifice triggers
Show steps
  1. During an opponent's turn, activate Skullclamp's equip ability by paying {1}, attaching it to another creature with toughness equal to 1.
  2. The creature dies as a state-based action due to having 0 toughness. The Watcher's second ability triggers if the creature was a Tentacle, and Skullclamp triggers.
  3. Resolve the Watcher trigger, if applicable, untapping a Kraken and putting a stun counter on a permanent.
  4. Resolve the Skullclamp trigger, causing you to draw two card.
  5. The Watcher's first ability triggers twice, creating two 1/1 Tentacle creature tokens.
  6. Activate Phyrexian Altar by sacrificing a Tentacle, adding {1}.
  7. Repeat.

Combo 4 with Wylie Duke, Atiin Hero + Heart of Kiran + Psychic Paper

Results: Infinite card draw · Near-infinite lifegain · Near-infinite lifegain triggers · Near-infinite ETB · Infinite draw triggers · Near-infinite LTB · Near-infinite death triggers · Near-infinite sacrifice triggers · Near-infinite colored mana
Show 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 Phyrexian Altar 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. Repeat.

Combo 5 with Wylie Duke, Atiin Hero + Heart of Kiran + Xenograft

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 colored mana · Infinite draw triggers
Show 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 Phyrexian Altar 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. Repeat.

Combo 6 with Wylie Duke, Atiin Hero + Heart of Kiran + Maskwood Nexus

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 colored mana · Infinite draw triggers
Show 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 Phyrexian Altar 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. Repeat.

Combo 7 with Wylie Duke, Atiin Hero + Heart of Kiran + Leyline of Transformation

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 colored mana · Infinite draw triggers
Show 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 Phyrexian Altar 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. Repeat.

Combo 8 with Wylie Duke, Atiin Hero + Heart of Kiran + Arcane Adaptation

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 colored mana · Infinite draw triggers
Show 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 Phyrexian Altar 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. Repeat.

Combo 9 with Wylie Duke, Atiin Hero + Heart of Kiran + Rukarumel, Biologist

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 colored mana · Infinite draw triggers
Show 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 Phyrexian Altar 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. Repeat.
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