Finding the cure

Target player gains control of target permanent you control.

Until end of turn, whenever a player gains life, that player loses 2 life for each 1 life they gained.

You don't lose the game for having 0 or less life. When you have 20 or more life, you lose the game. Whenever you lose life, you gain 2 life for each 1 life you lost. (Damage dealt to you causes you to lose life.)

Taste of Blood deals 1 damage to target player or planeswalker and you gain 1 life.