Shadeclaw Darkmantle

Flying.
When Shadeclaw Darkmantle enters the battlefield, you may have it attach to target
creature. If you do, that creature gets -2/-2 and
can't block as long as Shadeclaw remains
attached.
Shadeclaw Darkmantle can't attack or block as
long as it's attached to a creature. {b}: Detach Shadeclaw from a creature.