Nautilus, Titan of the Depths

Tank (This creature has vigilance. {t}: This turn, all
damage that would be dealt to target creature is dealt
to this creature instead.)
Whenever a creature blocks or becomes blocked
by Nautilus, stun that creature. (Tap stunned
creature. As long as that creature remains tapped,
its activated abilities can't be activated. It doesn't
untap during its controller's next untap step.)
"Beware the depths."