rarity pokemon card set symbols Understanding Pokémon Chart for Set Symbols :

I think part of it is TCGPlayer factoring in availability, I know Radiant Greninja is available in two sealed products (the Origin Forme Palkia VSTAR League Battle Deck and the Quaquaval ex Deluxe Battle Deck) and Astral Radiance packs while the version of Radiant Charizard reprinted in the Prize Packs is only available in Crown Zenith

The Un-Sets refer to a collection of silver-bordered sets that all start with Un (Unstable, Unglued, etc.)

Printed with 0.2 layer height for the deckbox

As we get into Rare and Super Rare the ink cost can be up to 8, with a larger amount of cards having two or three effects

A creature's persist ability can bring it back again if its -1/-1 counters are removed this way

If the player doesn't, you mill three cards, then Combustible Gearhulk deals damage to that player equal to the total mana value of those cards