The so-called Annihilation Legion is a high-level summoning magic created by Green during the Nine Revered Mountains period of the Dimensional Esophagus, amidst endless lonely and boring years, by combining shards of the World's Heart with fresh high-order being bones!
And Green's original intent in creating this magic was to preserve the energy of the Shard of the World's Heart, slowing its dissipation.
Sealing and protecting the energy within it in the form of magical devices consumption.
Otherwise, the Shard of the World's Heart, once blasted into the Dimensional Esophagus through the Piercing Gate, would, like the shards of the World's Heart falling from the Wizard World bit by bit, eventually dissipate its energy over time, becoming something akin to Witch Essence, merely a shell.
