Consider Treacherous Blessing and similar ETB enchantments for maximum value
Aiming for green limits it slightly, but its still a decent enchantment
Creatures they begin to control after the ability resolves but before your next turn begins won't get -3/-0
If I had just read it like that instead of thinking of Bedlam Reveler and Electrostatic Infantry I would have had it as my number one card on my top cards list
Bladegriff Prototype isn't bad, but its effect doesn't always help you as much as it helps others, and once a multiplayer game is down to two players, it's basically just your opponent sacrificing permanents, which might not be that impactful in the late game
Between the lack of curation, the shoddy card treatment, and the fact that we literally only got Crimson Vow two months ago, Double Feature has all of the hallmarks of being a cash grab