Quincy of the Shadow

Add a number off +1/+0 counters to this card
equil to X.
{t} deal damage to player or plains walker
equil to this cards toughness.
{u/b}{u/b}{ut} remove a +1/+0 counter from
this card. Tap one untapper creature.
If this card has no +1/+0 counters on it put it
on the bottom of the library.