Mulligans
It’s very flexible and interesting. Some sort of regular balancing between life and death.
Felosophy, Flame Imp can give very strong early game.
Darkglare with Flame Imp or Raise Dead or same cards provides manacheats at midgame.
Flesh Giant has really cool synergy with soul fragments and self-damaging.
Soulciologist Malicia just one card army and strong andswer to agro.
Sphere of Sapience amasing card.
Keymaster Alabaster is a little possibility to lategame.