pokemon variety booster box Pokemon: Scarlet & Violet Base Set and an increased frequency of rare (holo) cards in every booster are just the beginning Variety Pokemon Booster Box Opening

In fact, they're straight up impossible in the game as-is

Brawl Not Legal Vintage Legal Timeless Not Legal Commander Legal Pauper Not Legal Oathbreaker Legal Penny Not Legal Toolbox Buy This Card Notes and Rules Information for Reins of Power: It is perfectly legal for either or both players to have zero creatures

They fire off removal at it like crazy

For instance, Thromok, the Insatiable, Borborygmos Enraged, and Rosheen Meanderer

The effect itself isn't really that weird in principal as it just redirects effects that apply to one player towards the other player instead, but the card itself has a lot of hidden nuances in it that aren't super obvious and instead you just sort of have to know that it works this way