mtg unfinity cards legal in commander Can I use an card a deck? put a +1/+1 counter on that creature Standard Procedure | Unfinity |

Following that logic, the idea of removing Wyleth before it can attack is something everyone at the table will think of, so you need to include multiple cards to prevent that

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However, you must also sacrifice a creature to pay for the spell, and it generates three red mana

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Then you can tap him for no mana to prevent all combat damage a dork would deal this turn, and the controller and the attacked one draw half damage in cards

The more you get, the more abilities Rex comes into play with, and you're almost always up cards in the exchange