Zande, Bloodlight Magus

Hexproof
{3}{r}, {t}: Put a Transfusion counter on target creature you don't control.
At the beginning of each opponents upkeep,
place a -1/-1 counter on each creature they
control with a Transfusion counter on it, then
place a +1/+1 counter on target creature you
control for each creature affected this way.