Cavern of Souls (Topper) [Ultimate Box Topper] Nastiest ) You can select 1

) You can select 1 face-up Effect Monster on the field if it''s not already selected by this card

Set: Legends Type: Legendary Creature — Elder Dragon Rarity: Rare Cost: {2}{W}{W}{U}{U}{B}{B} Flying

you may put a fuse counter on Powder Keg

there is no meal like the present

OR when a Normal Spell/Trap Card is activated: You can detach 1 Xyz Material from this card

Cavern of Souls (Topper) [Ultimate Box Topper] Nastiest ) You can select 1Set: Ultimate Box Topper Type: Land Rarity: Mythic As Cavern of Souls enters the battlefield, choose a creature type. {T}: Add {C}. {T}: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type, and that spell can't be countered.