How can you create a combo with Kels, Fight Fixer, The Watcher in the Water, Phyrexian Altar?
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[START OF COMBO]This combo can be formed with Kels, Fight Fixer, The Watcher in the Water, Phyrexian Altar

Color identity: UB
Mana cost: 
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.[END OF COMBO STEPS]

Result:
  - Infinite card draw
  - Infinite draw triggers
  - Near-infinite death triggers
  - Near-infinite enters the battlefield
  - Near-infinite leaves the battlefield
  - Near-infinite sacrifice triggers
  - Near-infinite untap of Krakens you control[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - It is an opponent's turn.
  - You control at least one additional creature.
[END OF COMBO PREREQUISITES]
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