Brass Knuckles (SNC) from Streets of New Capenna, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Yeong-Hao Han
• Card Text:
  When you cast this spell, copy it. (The copy becomes a token.)
  Equipped creature has double strike as long as two or more Equipment are attached to it.
  Equip 1 (1: Attach to target creature you control. Equip only as a sorcery.)