How can you create a combo with Aetherflux Reservoir, Leshrac's Sigil, K'rrik, Son of Yawgmoth?
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[START OF COMBO]This combo can be formed with Aetherflux Reservoir, Leshrac's Sigil, K'rrik, Son of Yawgmoth

Color identity: B
Mana cost: 
Steps:
  1. Cast Leshrac's Sigil by paying 4 life.
  2. K'rrik and Aetherflux Reservoir triggers.
  3. Resolve the K'rrik triggers, putting a +1/+1 counter on it.
  4. Resolve the Aetherflux Reservoir triggers, gaining you life equal to the number of spells that you have cast this turn.
  5. Activate Leshrac Sigil's second ability by paying 4 life, returning it to your hand.
  6. Repeat for infinite life.
  7. Once you have infinite life, you can activate Aetherflux Reservoir by paying 50 life, dealing 50 damage to any target.[END OF COMBO STEPS]

Result:
  - Infinite damage
  - Infinite lifegain
  - Infinite lifegain triggers
  - Infinitely large K'rrik
  - Infinite storm count[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Aetherflux Reservoir must be on the battlefield
  - Leshrac's Sigil must be in your hand
  - K'rrik, Son of Yawgmoth must be on the battlefield
  - Your life total is at least 33.
[END OF COMBO PREREQUISITES]
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