Vexcrus, the Corpse Moulder

Equipment you control have hexproof.

Discard a card: Return target creature card from a
graveyard to the battlefield under your control. It
loses all types and becomes an equipment artifact
with Equip {x}, where X is its mana cost, and it has
"Equipped creature has this card's other
abilities and gets power and toughness equal to this
card's power and toughness."

Its titanic form encloses an armory of corpses.