When a monster(s) would be Normal or Special Summoned: You can negate the Summon, and if you do, destroy that monster(s), then discard 1 Fiend monster. If a "Dark World" monster(s) you control would be destroyed by battle or an opponent's card effect, you can banish this card from your GY instead. You can only use each effect of "Dark World Punishment" once per turn.
