Obsianus' Heart

Equipped creature gets +1/+1 and has Vigilance.
{1}{r}: Attach Obsianus Heart to a non/creature
artifact. It becomes an Artifact Creature Golem
with Power and Toughness equal to its
converted mana cost. Play this as a Sorcery.
Equip {3} If Obsianus Heart is attached to an
Artifact Creature this way, the creature stops
being an Artifact and gains the Red color.
"Now, if it only had a heart." Obsianus, Tin Maiden