Blood Magus Abilities

Blood Component:
May substitute a drop of blood for a spell's material component. The pinprick or minor cut needed to invoke this ability is considered a free action. The cost in blood (hit point damage) increases exponentially with the cost of the material component:

Wounds will automatically be stabilized when hit point total drops below 0. If a wound would take him below -75, however, the body is still slain.

Up to six spells can be carved into his flesh, as per Scribe Scroll, to be cast at a later time. The carved scratches remain fresh until such time as the spell is cast. Current spells are listed below:

Death Knell:
Once per day, as a spell-like ability, Cogliostro may cast Death Knell.

Blood Draught:
Cogliostro now has the ability to "brew" potions that contain spells of up to 3rd level within his own bloodstream. Once "brewed", the potion remains within the blood stream until called forth, an action which requires a simple cut to draw forth the intended potion (a standard action). Such Blood Draughts are never accidentally lost through major blood loss or blood-draining attacks, though they will be ruined if Cogliostro's body is ever slain. The Blood Draughts may also be used by another creature (if they have the stomach to drink it) by a simple act of Cogliostro willing the Blood Draught to come to the wound's surface. The number of Blood Draughts that can be held within Cogliostro's bloodstream is Constitution score(30) + Blood Magus Level(4), for a total of 34 possible Blood Draughts able to be carried at any given time (plus an extra 10 while wearing his CON boosting item).
The current Blood Draughts are listed below: