Granted, you do need a discard outlet to get Worst Fears into the yard, but that's a small concession when building with the color that specializes in discard effects
Since Umbris will likely retain these stats even after being removed, due to the difficulty of interacting with cards in exile, decks with him at the helm have the option of trying to mill their opponents out of the game
The fact that he can only copy spells from that zone does him back a little bit, but its not like there arent a plethora of instants and sorceries that come with built-in ways to be cast from the graveyard, with Flashback being the most common
Dire Fleet Poisoner was originally added to the tabletop version of the game as part of the Rivals of Ixalan expansion, while Blade Splicer hails from New Phyrexia
For now, though, you can find some more helpful and informative reads in our pages on the MTG release schedule and best MTG Arena decks.
I'd say her stay in the Basalt Spire suppressed her spark turning her into a human again, but that she wasn't sired by Sengir afterwards
