Komainu Battle Armor - 60 R NEC

Menace
Equipped creature gets +2/+2 and has menace.
Whenever this creature or equipped creature deals combat damage to a player, goad each creature that player controls.
Reconfigure {4} ({4}: Attach to target creature you control; or unattach from a creature. Reconfigure only as a sorcery. While attached, this isn't a creature.)

rare
Artifact Creature — Equipment Dog
From the Magic: The Gathering set Neon Dynasty Commander.