digimon tcg booster box Card Game - - EX09 which played a major role in the manga Digimon Special Booster 2.5 -

Ace cards are some of the highly sought-after in the set, and in the Western version of the game, we were treated to unique alternate arts of every single Ace Digimon, making the set even more in demand

C Common NEXT X TRAP Special Summon any number of monsters with different names from your hand and/or GY, in Defense Position, that are all "Neo-Spacian" monsters or "Elemental HERO Neos", but negate their effects, and as long as you control any of those Special Summoned monsters face-up, you cannot Special Summon from the Extra Deck, except Fusion Monsters

As for payoffs, there arent too many but the few that exist could go off if you get the nut bird deck

It's a staple in midrange and control sideboards, especially in metas full of degenerate combos or big mana nonsense