Kuriboo

(This card is always treated as a "Kuriboh" card.) When an opponent's monster declares an attack: You can discard this card; add 1 "Kuriboh" monster from your Deck to your hand, except "Kuriboo". Once per turn (Quick Effect): You can discard 1 Trap, then target 1 face-up monster your opponent controls; it loses 1500 ATK until the end of this turn.

Fiend DARK Effect Monster 1 effect