Self-Replicating Blood Magic (concept)
Self-Replicating Blood Magic is a name for a series of rituals and a spell which is commonly believed to be the most powerful and dangerous spell known to humans. An exceptionally complicated spell, Self-Replicating Blood Magic is only castable by the most powerful of Magi and normally requires numerous others to assist them.
The spell detonates the target in a massive pillar of flame, and quickly does the same to anyone within the blast radius and beyond, spreading even further to Magi or others with magical properties. While theoretically it can be contained to a specific radius or group, the spell is extremely difficult to control, and there has never been cast in recorded history without the caster rapidly losing control.
The spell was thought lost after its discovery and use by the competing Sarradonian Qurati and Almadi Magi cabals, who wiped themselves and nearly all of the continent's Magi out in the blast and brought anarchy across Sarradon for nearly a century after. It was later discovered by Legon-Aautokratir Aeschraes and Aautokratia Axiaothea during the Aversarian Civil War. While both prepared to cast it, only Aeschraes managed to in time, and ended up killing 80% of Aversaria's Magi, nearly half of the population otherwise, and wiped out millions otherwise across the entirety of the world. The pure magical power of the spell and the suffering it caused would open The Rift and bring forth Frodbrokna.