This week, that tribe is the Illusions, and we'll making lots of them, cheating mana costs and drawing lots of cards thanks to Minn, Wily Illusionist from the Adventures in the Forgotten Realms Dungeons of Death preconstructed deck
For an uncommon, she offers quite a lot of utility that can really help out white in the card advantage department
Lastly, Im not sure that Im running enough creatures to make Soul Manipulation more than an expensive Essence Scatter
Great reanimation target in Legacy
Serum Visions is probably the second-best, or maybe Inquisition of Kozilek
Maybe it would be enough, if it were an improved Wild Mongrel