Blood Mage (Unabridged‪)‬

Milton was your average delivery driver until he had a run in with a dying fairy who imbued him with all his magical power. Now Milton can literally tear the blood out of his enemies with a gesture of his hand, every women he meets is attracted to his magical charm, and the powerful Fae Guild wants to pay him a bunch of money to fight evil. 

All these new powers are a good thing, since a mad scientist has unleashed a monstrous horde of, well, monsters into the world, and Milton, along with his two new girlfriends, are the the only people who can stop him.

This novel contains a harem.