Skarlet, Blood Magik Mage

Lifelink, menace

Blood Ritual - At the begining of your upkeep, if you control ten or more blood counters, you win the game. Activate this effect only if you have 40 or more life.

At the beginning of your end step, sacrifice a blood token.
If you can't, sacrifice Skarlet, Blood Magik Mage.

Sacrifice a blood token: Regenerate Skarlet, Blood Magik Mage.