digimon card game greymon BT3-011 U - [Japanese TCG] 2 Digivolve Cost Level Digimon Trading Card Game Classic

There arent a ton of great discard outlets in Standard to abuse this with, but Im certainly in for trying to discard Retriever Phoenix to The Royal Scions, or just freerolling it off Seasoned Hallowblade

[1] (Quick Effect): You can change any number of face-down monsters on the field to face-up Defense Position, then you can change other face-up monsters on the field to face-down Defense Position, up to the number of Flip monsters that were flipped face-up

And as callbacks go, I like that Bolass ultimate made reference to his original card from Legends while also being built upon to make it more jaw-dropping

Poison-Dark Pokemon 7

It's perfectly legal in the 99 or as your Izzet commander

This provides the necessary energy to unleash powerful attacks and ensures a steady supply of energy throughout the game