Elder Deep-Fiend seems pretty good in EDH, because it wins through almost any board, tapping four creatures and swinging in. Flash gives emerge a big advantage, so you sacrifice in response to removal. I just want to point out that the card has a 4, 5, 6, 7, and 8 in it’s text/mana cost/power and toughness. Soul Separator is very flavorful, because you get a Spirit (the soul) and a Zombie (the body) of whatever creature you exile from your graveyard. The spirit has all the abilities of the original card, but is more fragile, where as the Zombie has the power and toughness of it. I don’t see it seeing play in Constructed, because it’s too slow. It can be used in EDH as a reanimator-ish spell.
What do you think? Comment below!