'H-how did he…?!'
Stefan knew he didn't have the luxury of time based on what had just happened now.
It was too dangerous to be in such close proximity with the enemy. Stefan instantly realized that and did the only sensible thing he could at that moment.
Right now, his priority was getting away from him as soon as possible.
'Blue!'
Blue warped space, whether to cause teleportation or shred his targets into bits under spatial pressure.
Stefan knew the latter wasn't going to work on his opponent, so he opted for the former.
First of all, his 'Blue' established a spatial barrier between the two of them—one which Stefan knew wouldn't nearly be effective enough.
Once the barrier was established, space around him began to shift and warp.
All of this happened within the same moment, and Stefan vanished from where he stood almost instantly.
~VWUUUUSSSHH!~