Where I give Costume Closet the edge is in addition to death, flickering, and airbending easily reset the Closet or refill it
50M+ IP pool across 100+ countries
The cards you draw with Embrace are, unfortunately, temporary, but that hardly matters when you consider the raw card advantage it can get you over the course of a game
I see it as a requirement to play one because if you are attempting to win with Serra Angel and there is a Maze of Ith (commonly restricted) in play, you need more ways to destroy it than a single Chaos Orb (although Stasis is another solution to Maze after the first activation)
Spells and abilities that would normally cause you to gain or lose life still resolve while your life total can't change, but the life-gain or life-loss part simply has no effect
Even if youre not looking to maintain the value of your cards per se, I doubt youre eager to have a bunch of warped, curled, or bent cards