sleeves for oversized commander cards Magic: The Gathering Card Back Ultra PRO - Oversized Magic:

Its role in the narrative is akin to that of a guardian or a warrior, protecting ancient secrets or valuable treasures within the Paldea region's expansive landscapes

"Wait and see what it's for!" Though one Pokmon TCG Pocket mystery has today been solved, fans will just have to be patient before this other one is detailed

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A sleeve wont bump up a grade by itself

Famous examples include the Legendary Dragons (could fuse with anything of a certain category to create a new monster with varied effects), Neo Galaxy-Eyes Tachyon Dragon (could "time travel" by reverting the gamestate), The Seal of Orichalcos (allows a player to put Monsters in the Spell/Trap Zone), Supreme King Z-Arc (counted as Fusion, Synchro, Xyz, and Pendulum simultaneously), and the Meklord Emperors (consisted of five monsters summoned simultaneously to make a whole)

If a merged creatures top card is a token, then its a token creature