pokemon cards swampert - 35/160 Reverse Holo Rare you may attach a Water Energy card or a Fighting Energy card from your hand to 1 of your Pokémon Pokemon Cards - Mega Swampert

It's more than just nostalgia

(It's an artifact with " , Sacrifice this token: Add one mana of any color.") Enchantment Color tag templates(None) Smuggler's Share At the beginning of each end step, draw a card for each opponent who drew two or more cards this turn, then create a Treasure token for each opponent who had two or more lands enter the battlefield under their control this turn

As you'll notice, however, it actually references "casting cost", which was later errata'd to the now iconic "converted mana cost"

The cards are produced in groups of cards called "sets"

A decent chunk of the cards in the leak were also shown in TPC's set reveal trailer