Fabled Sword of Nakar

Equipped creature gets +X/+X where X is the number of Golds you control and has goldsword (Whenever this creature deals combat damage to a player, create a colorless artifact token named Gold with "Sacrifice this artifact: Add one
mana of any color to your mana pool.")
Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)