one piece op-08 booster box Two Legends (Japanese) – JapHunter Big Mom Pirates as purple One Piece Trading Card Game:

That's where a board wipe comes into play: when you need a reset, nothing does it better than a board wipe

Even those that have real cards on the back dont tend to have big mana value differences between them, so the benefit for transforming isnt massive

And as we played more, it became obvious that our one small dungeon didn't have enough variety from one game to the next to support people jamming in hundreds and hundreds of games, and the sense of exploration would diminish even faster

For example, Captured Sunlights cascade trigger would allow you to cast the next nonland card with mana value 0, 1, 2, or 3 from your deck