Bladewave is a spell that creates a series of powerful black blades of energy. This spell is similar to the Bladestorm and Darkwave spells, also used by the Blood Spiral.
History
Bladewave was used by Rassimov inside the Mausoleum of Sir Lancelot against Lok Lambert. The spell hit Lok, interrupting his summoning of Lindorm and allowing Rassimov to grab Cavalier's amulet and try to summon it. S1E18
While attempting a surprise attack on the Huntik Team by the Temple of Poseidon, Rassimov used the spell on Dante Vale. Dante was able to dodge the burst of dark blades. S1E20
In the surroundings of the Phoenix Volcano, a Casterwill Hunter used a powered-up version of Bladewave after sacrificing a Nighlurker Titan with Powerlock against Dante, Montehue, Tersly and Den. They all managed to dodge the spell, but it ripped a hole in the ground where it passed, leading to a lava tube in which Lok, Sophie and Cherit were, to collapse in on itself. They managed to escape in time. S2E44