You can have 15 decks
You may then pick between the booster packs you want to open
So build a huge token army and use it to clear the board of any other creatures
There are 11 energy types in the Pokemon TCG: Grass, Fire, Water, Lightning, Psychic, Fighting, Darkness, Metal, Dragon, Colorless, and Fairy (now merged into Psychic in modern formats)
The term "defending player" in the myriad rules (or any other ability of an attacking creature) refers to the player the creature with myriad was attacking at the time it became an attacking creature this combat, the controller of the planeswalker the creature was attacking at the time it became an attacking creature this combat, or the protector of the battle this creature was attacking at the time it became an attacking creature this combat
In addition, also brings about Curiosity effects