Meng Jiang's theory was correct. Izroth not only used Flickering Steps but also all four charges of his Enhanced Instantaneous Movement.
Every time he delivered a set of players outside the range of the Failed Chimera, he immediately used Enhanced Instantaneous Movement to make his way back to the battlefield.
Given that the skill only allowed Izroth to move 15 meters at a time, yet he covered a distance of almost 50 meters—it would not have been possible if not for the improvement to his Source.
'It's a good thing I recovered all of my loss Essence from consuming the Essence of a Great Spirit. Still, I never thought the limits of my Source would develop to this extent. I underestimated the difference between my former Soul Essence and a Spirit Source.'
Before it evolved into a Spirit Source, Izroth's Soul Essence limited the range of his skills, and regardless of how much Essence he poured in, it could not increase by more than 50%.