Obliterator

Chaos Offering
At the beginning of your attack phase Obliterator
gains your choice of Firststrike, Deathtouch, Lifelink, Menace, Trample, Battle Cry, or
Flanking until the beginning of your next turn.
An Obliterator is able to absorb any weapon into its
body that is held for too long. These unfortunates can
spawn these weapons from their very flesh, and also
grow ammunition for them.