Celesteela

Flying, predator (Whenever a creature dealt damage by Celesteela this turn dies, put a +1/+1 counter on Celesteela.)
{x}{x},{t}: Put a seed counters on X target creatures.
At the beginning of your end step, Celesteela
deals damage to each creature with a seed counter
on it equal to the number of seed counters on
that creature. You gain life equal to all the
damage dealt by Celesteela this way.