Mildred, Sanguine Manipulator

Lifelink

Mildred, Sanguine Manipulator's power is equal to the number of Blood tokens you control.

At the beginning of each end step, create a Blood token if
an opponent lost life this turn. If you lost life this turn, create two Blood tokens instead.

{w/b}{w/b}, Sacrifice a Blood token: Put a shield counter
on target creature you control.