[quote=@Letter Bee]
<Snipped quote by ZAVAZggg>

That might work, but what would be the limits to said power, then? My thoughts were that my PC can make a wide range of effects happen, but the more powerful the effect, the more of his blood is needed. This allows my PC to heal, throw fireballs, and project his consciousness out of his body, but prevents him from destroying entire cities without killing himself or spending entire months stockpiling blood.
[/quote]

That might work. Again, I'm not entirely sure of the limits such an ability might have. Maybe make it to where he has to use his own freshly drawn blood in order to use his powers.