They ended up having to ban it, but only did it after it was made obvious how problematic the card was, when some player played the card with no wincons in the deck, just casting it over and over again with no ability to end the game, except hoping the opponent would concede
In this strategy, you are best suited using an army of 2/1 creatures like Dauntless Bodyguard or Skymarcher Aspirant to hit early and capitalize late
I got the images from google
ACE SPEC (ACE): A rarity that has been present in certain Black & White and Scarlet & Violet era sets
Two types of cards are available: Yuna [12-105L] with a foil-stamped signature of Tetsuya Nomura, and Warrior of Light [19-128L] with a foil-stamped signature of Miki Yamashita
Kozilek, Butcher of Truth or Kozilek, the Great Distortion