My favorite double-faced villain is Ultimecia, Time Sorceress, which has an ability we'd normally never put at uncommon, especially on a creature: an extra-turn effect
(And as an aside, I always encourage folks to seek out their favorite set for reasons like this, just in case there is more to see.) The design is next-level inspired and the composition equally so
The best part of this Leader is the [Overlord] skill combined with another ability that lets you play Vegeta cards with [Servant]
Once per turn, during the End Phase, if you control no "Libromancer" Ritual Monsters: Send this card to the GY
Looking at one of the games most evil colors: Black
Its very likely that this blue enchantment becomes a blue staple, especially given that Fractured Realm is the most juiced-up Panharmonicon weve ever seen, doubling all sorts of triggers, including attack triggers