Slifer the Sky Dragon (Ultra Rare) [GBI-001] Ultra Rare Crossed Souls If you negate an effect

If you negate an effect this way

you can Normal Summon 1 "Frog" monster during your Main Phase this turn

attach this card from your hand or field to it as material

Set: Astral Pack 5 Card type: Xyz/Effect Monster Rarity: Ultimate Rare Attack: 1500 Defense: 2400 2 Level 4 monsters Once per turn: You can detach 1 Xyz Material from this card

Slifer the Sky Dragon (Ultra Rare) [GBI-001] Ultra Rare Crossed Souls If you negate an effectSet: American God Cards Card type: Normal Monster Rarity: Ultra Rare Attack: X000 Defense: X000 The heavens twist and thunder roars, signaling the coming of this ancient creature, and the dawn of true power.