terastal festival booster box pokemon center Festival: Pack – The Trainer Court ups every trainer craves EXPLOSIVE !! Pokemon Terastal Festival

AlexRC didn't specify the playstyle for this deck

It's Semi-Forbidden, so any 35-card deck can play a copy

When the effect of a Spell, Trap, or Effect Monster is activated, you can Tribute this card to negate the activation and effect of that card, and destroy it

Some monsters also treat themselves as the titular monster, but are Level 7, referencing the original Level of "Summoned Skull" in the Yu-Gi-Oh

Damage and horror can still be moved from him, though, which works well with his signature event Stouthearted (The Feast of Hemlock Vale IE, 17), which lets him move damage/horror to an enemy he engages to keep himself on the board as long as possible