Stronghold Berserker

Deathtouch, Reach, Vigilance
Whenever Stronghold Beserker blocks another
creature, it gains +0/+X where X is the number
of creatures on the battlefield.
Stronghold Berserker cannot be destroyed by
deathtouch.
If an indestructible creature blocks Stronghold
Berserker, that creature's controller may either
sacrifice or exile it.