Vampiric Blood

The following spell name is directly taken from Blizzard, but I owe nothing related to World of Warcraft nor Blizzard. I merely wish to bring the spell to the masses. All rights go to Blizzard Entertainment.

Creator note: This spell might feel extremely powerful, and probably is, so make sure to consult your DM before use. I made it with the Death Knights from the World of Warcraft universe in mind, therefor making it powerful.    

For the next minute, you emit a scarlet red aura that smells of damp blood. Your eyes also turn scarlet red during this time. While under the effect of Vampiric Blood, your maximum hit points are increased by 2 maxed out (highest amount on the dice) hit point dices and all melee weapon attacks and melee spells heals the caster for 2D4 on a hit.