You can't play it because Digi-Egg cards don't have play costs
I even doubted initially that I could make a decent deck with such a difficult deckbuilding restriction, but in the end Im glad I got to try it out because the result is super sweet
Unleash the spooky fun with YuGiOh 2022 Ghosts From The Past - The 2nd Haunting set
I felt like the underdog going into this game as I knew that 2-Drops, 3-Drops, and 4-Drops had stronger card pools to work with, especially when 4-Drops was helmed by Omnath, Locus of Creation, which could easily start playing multiple 4-Drops by turn 5 and was at the right mana value to start casting board wipes regularly
cards also dont cycle out unless they get outright sniped on the ban list
Hurkyl is almost there, rewarding the controller for tapping mana on their own turn with card advantage