Pin Collector's Booth (Black Lotus Unknown Planechase)

Whenever you attack, create a Pin Aura enchantment token attached to target attacking creature you control. It has enchant creature and "Enchanted creature gets +1/+1." Whenever chaos ensues, each opponent loses X life, where X is the total number of pins attached to you, your nearby belongings (such as a playmat or backpack), and creatures you control.