Rena, Fractured Loyalty

Lifelink, haste
Survival — At the beginning of your second main phase, if Rena, Fractured Loyalty is tapped, put a +1/+1 counter and a First Strike counter on her. If she already has First Strike, instead put a Double Strike counter on her.

At the beginning of your end step, sacrifice a creature. If you do, draw a card and put a +1+1 counter onto Rena, Fractured Loyalty If you can’t, target opponent gains control of her.