Ghost Mourner & Moonlit Chill [ETCO-EN036] Secret Rare Gladiator's Assault When this card is Fusion

When this card is Fusion Summoned

Trap Card or Effect Monster's effect that includes an effect that Special Summons a monster(s)

and Graveyard

Its effects are negated and cannot attack

Ghost Mourner & Moonlit Chill [ETCO-EN036] Secret Rare Gladiator's Assault When this card is FusionSet: Eternity Code Card type: Tuner Effect Monster Rarity: Secret Rare Attack: 0 Defense: 1800 If your opponent Special Summons a monster(s) face up (except during the Damage Step): You can discard this card, then target 1 of those face up monsters; negate its effects until the end of this turn, also if that face up monster leaves the field this turn, its controller takes damage equal to its original ATK. You can only use this effect of "Ghost Mourner