Xoth's Mask of Transmutation

Equipped creature has "{2}: Switch target
creature's power and toughness until end of turn"
Summon Xoth — {t}, Exile four other artifacts
you control with the ability "Summon Xoth":
You may search your hand, library, or graveyard
for a card named "Xoth, Necromancer King" and
put that card onto the battlefield tapped, then
shuffle your library.
Equip {1}