Spoiler warning. This page gives away the puzzle from 30 September 2025. If you have not played it yet, try it first – five guesses, and it is still there.
A dark emissary that special summons when you take damage.
Type: Effect Monster
Set: Battle Pack: Epic Dawn
CardMarket price: 2.34$
Text: When you take damage from a card in your opponent's possession: You can Special Summon this card from your hand. You must control no cards to activate and to resolve this effect. If Summoned this way, activate the appropriate effect, based on the type of damage:
● Battle damage: Special Summon 1 "Emissary of Darkness Token" (Fairy-Type/LIGHT/Level 7/ATK ?/DEF ?). Its ATK and DEF are each equal to the amount of battle damage you took.
● Effect damage: Inflict damage to your opponent equal to the amount of damage you took.