Quincy of the Shadows

Add a number off +1/+0 counters to this card
equal to X.
{t} deal damage to player or planes walker
equal to this card's Power
{u/b}{u/b}{ut} remove a +1/+0 counter from
this card. Tap one untapped creature.
If this card has no +1/+0 counters on it put it
at the bottom of the library