Abigail, Persistent Inquisitor

{w}{u}{b}: creatures you control with shadow can
block as though they didn't have shadow until end
of turn.
Whenever a creature you control with shadow
deals combat damage to a player, add {1}. This
doesn't fade out as phases end. Then look at the
top card of that players library. You may play that
card until end of turn.
"What I need to know is how long did you think you
could keep this from me?"