I've forced it in a couple drafts (because no one picked it), and it's a lot worse than Tooth. It'd be pretty deece if you have some
Karn Liberated and you want to put
Nicol Bolas, Planeswalker in your white deck, but overall you have to do a lot of work to make it worth the value. I dipped out once I removed planeswalkers from my cube just cuz of my players. But I also didn't have an enchantment package.
I find

Way better because it at least fits in a mono-black deck too. Still glacially slow, but it gets scary quick. Don't do
Portal to Phyrexia though, that thing will eat your opponent.
Also,
this new card looks like a solid higher power alternative (although you literally just win with
mindslaver, but to me that's more of an upside... Maybe switch to
kindslaver? or
Possessed Portal??)
What enchantments are you wanting to reanimate that
Sevinne's Reclamation doesn't hit?