detain cards mtg Render Silent azorius detain (return of Ravnica)

You want to be able to cast a spell or two every turn, and having too many expensive cards will stop you doing that

Ursula, Power Hungry doesnt just accelerate your own progression, either

Proof of Concept A few test games against decks from my Banlist Testing gauntlet with each version later, and there was still no clear answer

tokens once they complete the fourth Color Challenge tutorial level

So much new MTG product is hitting the scene so quickly that players are still picking up cards for the last product that was released

Taking a spell and removing it from relevance for a few turns is a perfect encapsulation of tempo, in that youre not actually dealing with the card outright, and are instead just delaying the inevitable