Cranial Ram (MH3) from Modern Horizons 3, available at 401 Games Canada.

• Rarity: Common
• Finish: Normal
• Artist: Allen Williams
• Card Text:
  Living weapon (When this Equipment enters the battlefield, create a 0/0 black Phyrexian Germ creature token, then attach this to it.)
  Equipped creature gets +X/+1, where X is the number of artifacts you control.
  Equip 2