SE Secret Rare Invoked Cocytus X WATER Level 6 [ DragonFusionEffect ] ATK 1800 DEF 2900 "Aleister the Invoker" + 1 WATER monster Cannot be destroyed by your opponent's card effects
Not only was it never made available in packs, but it was only ever given to members of the English FA's Pokemon Youth Futsal Program
Alternatively, the mere act of having completed a dungeon powers up a lot of combat-oriented decks, thanks to cards like Nadaar Selfless Paladin, Ellywick Tumblestrum, and Gloom Stalker
That being said, even in the context of the Death Toll person, this still requires work, so it's not like it's broken or anything
M Scizor Ex is a Steel-type Pokemon that can rip any Special Energy or Stadium cards your opponent has in play with its Iron Crusher Move
You can only use this effect of "Mecha Phantom Beast Kalgriffin" once per turn