mtg time spiral remastered booster box - 3 Uncommons It's Time for Time Spiral

Colorless cards occupy a unique space in Magic

The same is true of Hooting Mandrills, Sultai Scavenger, Bitter Revelation, and so on

If you want to take things to infinite combo territory, Samwise Gamgee also has that in spades

Please keep in mind that this is all speculation, we don't actually know the rules yet and there hasn't been any explanation from official sources on how this works

The monarch draws a card at the beginning of their end step, and players who aren't the monarch can become the monarch by dealing combat damage to the current monarch or by playing their own monarch card

This is called a mulligan in card games