I had a hemomancer for awhile. He'd boil people's blood and cook them from the inside out. Or increase blood flow until veins ruptured...or pop veins one-by-one and watch pink, soft bodies go black and sag. Or just, you know...slice his wrist open, force his blood into any open orifice and blend on high until the organ smoothie has no pulp. 

Sometimes I wonder why people let me outside.