Darkrai, Living Nightmare

Flying, Deathtouch, Ward {3}, Bad Dreams
(When ever an opponents creature is tapped for
any reason it gains a (-2/-2) counter)
Creature your opponent summon enter tapped
{t}{4}{p/u} Nightmare (Deal 4 damage to any target
and tap them)
To protect itself, it afflicts those around it with
nightmares. However, it means no harm.