As soon as Nemo parted Nevar of his forearm, he continued the next part of his plan. The spell he used earlier on his blade attached a thin thread of mana to it, spanning from the middle of the blade to Nemo's hand. He had been intently guiding the spinning blade's path ever since he threw it, causing the blade to swing back around once it reached the end of it's tether. To the common eye the thread would be incredibly hard to notice, but with manalysis active it would emit a feint glow. 

Nemo made the final adjustments to the flight path of the sword once he spun back around to face Nevar. By this time it was mere seconds away from colliding with Nevar. 

Had had guessed correctly by assuming that he would teleport back to the middle rune. Nemo had kept quiet about it the whole fight, but he had picked up on Nevar's placement of his runes early on. Nemo's enjoyment was no longer held back, openly laughing as he waved at Nevar with his gloves hand.