Hybrids - the product of protoss and zerg DNA. These abominations are the modern incarnation of the xel'naga, the biological sign that the universe has gone full circle. They are the ultimate evil, bent on death and destruction...
If he's mythic rare, I'd say he doesn't need the permanent sacrifice setback. After all, he has no generic mana. It HAS to be BBUU. The flash, deathtouch, and the 4 cards for 4 life would be plenty balanced for a mythic rare and such a specific mana cost. In fact, I might even still wonder after the matter whether or not it's powerful enough.
How did you do it?
Also, if you are interested, the Zerg symbol translates well into the symbol editor. Unfortunately I can't say the same for Terran or Protoss symbols