You're going to have a lot of different vampires with a lot of different powers, which means Redemption Choir is--at worst-- a Hill Giant with lifelink that can resurrect a three-mana critter
First, Galvanic Relay makes you play the exiled cards on your next turn, not the current turn, so youll be slightly less pressed for mana
Whenever you cast a red spell, Aragorn deals 3 damage to target opponent
Over the years, Time Vault has fueled numerous infinite-turn strategies, cementing its reputation as one of the most powerful artifacts outside the Power Nine
The best use case I can see with this is using it like a beefed-up No Rest for the Wicked, and instead of getting your stuff back to hand immediately, you make a bunch of tokens and then run out Illicit Masquerade