Sable Unicorn

First Strike, Deathtouch
Unveil {2}{b}{b}: You may pay {3} to play this card
face down covered with an Image counter that
shares at least one mana types spent (see reminder
cards.) It gains the listed ability and creature
types. You may choose to replace the creature
types with one other type of your choice. Turn
this face up at any time for it's Unveil cost.
"Come creatures can hide their poisonous nature until
it is too late for their prey."