Kythal Undercity Diver

{b}{b}{2}: Adapt X, where X is your Undergrowth -
(If this creature has no +1/+1 counters on it, put
X +1/+1 counters on it where X is the number of creature cards in your graveyard.)
{u}{g}, Remove a +1/+1 counter from Kythal Undercity Diver:
draw a card then put the top 3 cards of your
library into your graveyard.