Priestess of Rhonas

Whenever a +1/+1 counter or -1/-1 counter is placed on a creature you control, place one counter of the opposite type on a creature you
don't control.
Whenever a creature with a -1/-1 counter on it dies, you gain life equal to the amount of counters on it.
Whenever a creature with a +1/+1 counter on it dies, draw a card.