From publisher blurb:
The Bio-Mancer learns by surviving, and each encounter with a monster that the Bio- Mancer survives makes her more powerful and more determined. A Bio-Mancer learns to use the abilities of monsters against them, gaining a potent offensive punch. An experienced Bio- Mancer might unleash a gold dragon’s fiery breath weapon, turn her enemies to stone like a medusa, blast opponents with lightning stolen from a behir or suck away their life with a wraith’s touch.
Like a wizard or sorcerer, the Bio-Mancer uses spectacular combat magic to win battles, but unlike these more typical spellcasters, Bio- Mancers do not use neatly delineated spells as her occult weapon of choice. Instead, Bio- Mancers channel raw, monstrous energy….using the skills and powers of the multiverse’s most deadly creatures against them.