His deadliest Servant

When you set this scheme in motion, draw
two cards.
When you set this scheme in motion,
target creature gets +3/+3 and gains flying,
trample and mentor until end of turn.

"Sauron has yet to reveal his deadliest servant,
the one who will lead Mordor's armies in war.
The one they say no living man can kill. The
Witch-king of Angmar." —Gandalf