Pin Collector's Booth (Black Lotus Unknown Planechase PLA005) - Common

Whenever you attack, create a Pin token attached to target attacking creature you control. It's an Pin Aura enchantment with 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 and creatures you control. (This includes pins on your backpack.)