pokemon ex ruby sapphire booster pack Pokémon & The Pokemon VERY OLD* Pokémon EX Ruby

These weren't sold at retail

They can either allow you to take on a weaker opponent, or stall until youre ready to face stronger cards Mismagius ex or Cresseilia ex.

Why Collect Pokemon Cards

[328] Director Shigeru Ohmori stated that they designed the games based on what they believed of the biggest Pokmon theme of becoming/being "the greatest or strongest", which was expressed in the games' Dynamax / Gigantamax Pokmon core mechanic and the games' increasingly powerful software and hardware capabilities

While it costs four mana to cast normally, you can drop it down to just one red mana if you have a creature out with power four or more