Blood Magic

Blood Magic is never inherited or taught. It is actually a byproduct of a deal. When a person negotiates with a specific daemon, they are given assistance in becoming a reigning leader of many lands, under the condition that they give it "bits of wasted life". Some have speculated that blood magic is the part of the deal the daemon speaks about1.
As a result that person becomes a Dark White Mage.

Their spells consist of sacrificing their own health to heal someone, stealing enemy hp, or becoming a nuisance to their enemies.

BOON / BOONRA / BOONGA (Sacrifice HP)
Primary: Healing (Varies)
The dark white mage gives a bit of his life to his ally.

BLESSED CREST
Primary: Scan
The dark white mage creates a glyph and sends it to a target. He gets all the info he needs.

BLOOD CHARGE
Primary: Healing Strong
Secondary: Self Only

The dark white mage replenishes himself.

DREAD CELL
Primary: Attack Magic (Weak)
Secondary: 50% Drain

The dark white mage launches a ball of white energy and steals his foe's life force.

IRON HOLY
Primary: Attack Magic (Medium)
Secondary: Holy Elemental
Secondary: 50% Drain
Secondary: Random Enemy

The dark white mage summons a blue light and let's it attack a random target.

JOLT (Sacrifice HP)
Primary: Revive
The dark white mage brings a character back from the dead.

LIGHT CREST
Primary: Inflict Curse
Secondary: Lesser Status – Poison

The dark white mage summons a glyph that renders the target weak.

MIST (Sacrifice HP)
Primary: Esuna
The dark white mage rids all status ailments on a single target.

NETHER WISH (Sacrifice HP)
Primary: Bestow Regen
The dark white mage allows an ally to gradually heal over time.

RED HOLY
Primary: Attack Magic (Medium)
Secondary: Holy Elemental
Secondary: 25% Drain

The dark white mage summons a red light. It attacks his target.

SOUL CHARGE
Primary: Bestow Regen
Secondary: Self Only

A variant of blood charge.

SPARK CREST
Primary: Inflict Stun
Secondary: Area Effect

The dark white mage summons a glyph on the floor and sends it to his foes. They remained stunned.

STARFALL
Primary: Attack Magic (Strong)
Secondary: Drain 50%
Secondary: Area Effect (Hits all enemies)

The most powerful spell in the dark white mages arsenal. He summons massive meteorite to crash upon his enemies.

VITALITY WELL (Sacrifice HP)
Primary: Bestow Reraise
The dark white mage prepares an ally for the worst to come.