The Core has been sealed for the second time. Half of the Alpha Squad is dead. Spiral HQ has a new mission, protect the Sleeper and destroy the Swarm, become the Guardians of Cradle. It seems simple, right?

Wrong. When golems made from crystal attack Haven and nearly overrun the city's defenses, Spiral HQ sends the elite Theta squad to investigate the attack and find out the cause. They discover Equestria at war with Sombra, King of Darkness, the Crystal Tyrant.

Strap your boots on and sharpen your swords, Knights. Time to fight.

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Spiral Knights crossover set in the Crystal War alternate timeline, with a sort of AU. Will have swearing, but minimal gore.
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Theta Squad Roster and Equipment
Squad Leader-Corrus/Color-Light Blue
Weapons/Shield-Leviathan Blade, Valiance, Blitz Needle, Glacius, Aegis, Crest of Almire
Armor-Azure Guardian Armor, (Costume-Almirian Crusader Armor), Azure Guardian Helm (Costume-Magic Hood)
Battle Sprite-Drakon ("Blaze")
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Medic-Halvir/Color-Pale Green
Weapons/Shield-Cold Iron Vanquisher, Argent Peacemaker, Sentenza, Gilded Griffon, Grey Owlite Shield, Dread Skelly Shield
Armor-Radiant Silvermail (Costume-Azure Guardian Armor) Divine Veil
Battle Sprite-Seraphynx ("Kit")
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Heavy-Pellas/Color-Red
Weapons/Shield-Triglav, Nitronome, Callahan, Grim Repeater, Ironmight Plate Shield, Volcanic Plate Shield
Armor-Ironmight Plate Armor, Ironmight Plate Helm (Costume-Magic Hood)
Battle Sprite-Drakon ("Firo")
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Recon-Revan/Color-Gray
Weapons/Shield-Final Flourish, Fearless Rigadoon, Final Flamberge, Leviathan Blade, Swiftstrike Buckler, Aegis
Armor-Skolver Coat, Skolver Cap (Costume-S. Falcon Sentinel Helm)
Battle Sprite-Maskeraith ("Spectra")