151 booster pack box Charizard ex Pokemon TCG: Scarlet & Violet

Chaos Ruler, the Chaotic Magical Dragon Milling cards has always been incredibly powerful with the myriad of graveyard effects available in Yu-Gi-Oh, being able to get a bunch of monsters in the graveyard all at once can give you a huge advantage

Lifelink and vigilance should help you win most damage races, and sometimes giving +1/+1 to your team is enough to swing an entire board in your favor

Commanders like Zedruu, the Greathearted actually play this as a wincon

But the lack of blue reduces access to exchange effects, and having to deal combat damage really puts a crimp in the deck in anything but Duel Commander

This is a powerful combo line, but to set it up, you do need a creature in play to offer up to Polymorph