Tome of Blood

Tome of Blood is a special variant of Ars Nouveau spellbook. They have a connection to the user's Soul Network.
They have a special ability where they let you break through Mana cost limits of spells!

The tome will try to cast spells using player mana.

If the player doesn't have enough mana to cast the spell, it will try to use player's LP to compensate for the remaining spell cost at the rate of 10 LP per mana point

A Tome of Blood can be crafted using some amount of blood in a blood altar. Higher tier spellbooks can be converted to Tomes in the same fashion. The tomes can upgraded in an Alchemy Table (Check JEI).