Death Kiss Beholder

Ward 2. Menace. Cannot be tapped.
Lightning Shield--Any creature that blocks or is
blocked by this creature takes 3 damage and gets
a stun counter.
Blood Drain--{r}{b/r}{b}{x}: Deal X damage to any
target and you gain X life.
Tentacles--{b}{u/b}{u}{x}: Tap target creature for X
of that creature's controller's turns.