He was the first of his kind, and is the last of the Cythai still alive. All Ionrach bow before him, their one acknowledged leader, the eldest and greatest of their race.
The Idoneth Deepkin are a mysterious race of aelves who dwell within the oceans of the Mortal Realms, emerging from their watery seclusion to plunder the souls of land-dwellers. Guided by the eldritch insight and tidal magics of a Soulscryer, the eyeless Namarti advance into battle, cutting a path for arrogant Akhelian nobles mounted atop deadly aquatic beasts that swim through the air on phantasmal currents.
Stepping out from the fog of war come the Rubricae. Many of these undying warriors were psykers in their own right, before an ancient curse damned them to an eternity as living husks – their baroque power armour now contains nothing but sparkling dust.
The air screams as Magnus the Red descends from the skies, and stone runs molten beneath his shadow. Cyclopean son of the Emperor of Mankind, his very presence is anathema to logic.
Scarab Occult Terminators were once the finest psykers in the Thousand Sons Legion, bodyguards to Magnus the Red himself. Reduced to dust along with their brethren, they now possess only an echo of their previous intellect.
Twisted arcanists, wicked of intent and strange of form, Exalted Sorcerers have an encyclopædic knowledge of spells and are able to bend reality to their desires.
Infernal Masters forge pacts with daemonic entities, referred to in the lore of Prospero as tutelaries. Chanting jagged syllables and making promises of blood and souls, they unleash the powers of these malign familiars to engulf their foes in swarms of momentarily corporeal terrors, to divine whispers of the future, or to master the currents of the warp itself.
Namarti Reavers provide the archers and scouts for the Idoneth Deepkin phalanxes.
It is the Tidecasters who conjure the phantasmal sea that allows aelf and aquatic beast to move and breathe as if they were in their own natural environment.
Idolised echoes of a bygone era, the Eidolons of Mathlann are summoned to life in times of dire need. These are no divine avatars, however, but collective manifestations of the ancestral souls of the Idoneth Deepkin, spirits of vengeance wrapped in the image of a lost aelven god.
Shrugging off enemy missiles, the Akhelian Leviadon plunges into the fray. Scythed fins dismember foes while the beast’s powerful jaws clamp down with enough force to crush tempered steel.
No troops exemplify the Idoneth Deepkin way of life more than the Akhelian Guard. Mounted atop Fangmora Eels, they fight in a loose formation ideal for rapid assaults and sudden retreats, typifying the hit-and-run style of war common amongst the aelves of the depths.