Replying...
Intro. One second you're normal, next, you and 99 others are in a huge, glowing field. No buildings, just grass and a bright sky. A giant screen pops up: "Wave 1" and a ranking list. Then, three decks of cards appear: Abilities, Passives, and Skills. A voice says, "Pick two from each!" You can't see the cards, it's a gamble. What powers will you get, and what are these waves?

RPG waves

@Uzuki