Prestige Feat: Blood Magus

Prestige Feats are intended to be rewards for the PCs in lieu of gold or magic items. These are usually gained by either completing a special deed (finding a tome, being taught by an NPC, etc.). They are powerful abilities that make PCs and NPCs more powerful. 

As a Blood Magus, you gain the following benefits:

• You gain the ability to transfer your vitality into spell slots. As a bonus action, you can convert your hit points into a spell slot of which you can cast. You lose 10 hit points per level of the spell slot created. If converting your hit points into the spell slot would reduce you below 0 hit points, you are not able to create the spell slot.
• Also, if a spell requires material components that are consumed when the spell is cast, you can use your hit points in place of the component. For every 10 gp the material costs, you lose 1 hit point. Hit points lost in this way cannot be regained until you finish a long rest, or a greater restoration spell is cast on you.