Mairsil, the Pretender + Endling + Blood Vassal + Triskelavus

Mairsil, the Pretender
Endling
Blood Vassal
Triskelavus

Requires
Mairsil, the Pretender must be on the battlefield. Endling must be in exile. Blood Vassal must be in exile. Triskelavus must be in exile. Mairsil does not have a +1/+1 counter on it. Mana needed:
Steps
  1. Activate Mairsil using Endling's third ability by paying , giving Mairsil undying until end of turn.
  2. Activate Mairsil using Blood Vassal's ability by sacrificing it, adding .
  3. Mairsil dies, triggering its undying ability, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
  4. Activate Mairsil using Triskelavus' ability by paying 1 and removing the +1/+1 counter from it, creating a 1/1 Triskelavite artifact creature token.
  5. Repeat.
  6. Once you have infinite Triskelavite tokens, you may sacrifice them to deal infinite damage to any target(s).
Results
Infinite creature tokens. Infinite damage. Infinite death triggers. Infinite ETB. Infinite LTB. Infinite sacrifice triggers.

Mairsil, the Pretender
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