Dark Spirit Blood Summoning

Dark Spirit Magic (暗黒の魔法, Ankoku no mahō) is a type Caster Magic, Spatial Magic and Bloodline Magic that involves the summoning of Dark Spirits.

Description
A Magic in which the user summons spirits of darkness by opening portals via the use of sigils, and the caster’s own blood. Dark Spirit Magic is a Bloodline Magic, specifically one belonging to the Dracomira Clan. There are many types of dark spirits, such as Demons, and Elemental Spirits. Dark Spirit Mages are accredited by how many, and how powerful their spirits are.

Contracts and Rules
For a Dark Spirit Mage, going about making a contract is an extremely serious, yet unavoidable act. Because Dark Spirit Magic is a Bloodline Magic, it is passed down generation to generation. This means when a Mage dies, the Mage’s contracts are passed down to the current Dark Spirit Mage in the family, unless the Mage releases the Spirit from the contract. The contract can be tweaked to fit the needs of the new Mage, or the Spirit might have different requirements.

There are two important rules that must not be broken, or the consequences will be dire. The first rule states that the Spirit shall not attempt to murder its Summoner, lest it be stripped of its power for all eternity. The second rule is that if the Summoner ever breaks the contract, their immortal soul will be taken by the Spirit to do as it sees fit, for, you guessed it, all eternity.

Some Spirits, especially strong ones, can summon themselves without help from the Mage. Sometimes the Mage might need to forcefully close the Spirit’s gateway, or banish the spirit.

Dark Spirits
The Seven Princes Of Hell:
 * Asmodeus
 * Amon
 * Lucifer
 * Mammon
 * Belphegor
 * Leviathan
 * Beezlebub

Four Horsemen Of The Apocalypse 
 * Pestilence
 * War
 * Famine
 * Death

etc.