How can you create a combo with Agatha's Soul Cauldron, Triskelion, Evernight Shade?
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[START OF COMBO]This combo can be formed with Agatha's Soul Cauldron, Triskelion, Evernight Shade

Color identity: B
Mana cost: 
Steps:
  1. Activate Evernight Shade using Triskelion's ability by removing a +1/+1 counter from it.
  2. Repeat step 1 until Evernight Shade has no +1/+1 counters on it.
  3. Resolve all Evernight Shade abilities dealing 1 damage to Evernight Shade, and any remaining damage to any target(s).
  4. Evernight Shade dies as a state-based action due to having 0 toughness.
  5. Evernight Shade's undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
  6. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Agatha's Soul Cauldron must be on the battlefield
  - Triskelion must be exiled
  - Evernight Shade must be on the battlefield
  - Evernight Shade has at least one +1/+1 counter on it.
[END OF COMBO PREREQUISITES]
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