Hal's exclamation was one of Elation as the attack had knocked Arya away from under the Pentagram and the tendrils that had been holding her legs afloat were no longer attached to said legs but were still upright.
However, the attack had not truly injured Arya and right before Hal's eyes, the tendrils wound together and formed a Board that floated in mid-air.
Arya leaped on top of it and with it, she flew to Hal's height where his wings were keeping him airborne.
Arya joined her hands together and began to cast another spell with which was complete in a second in the form of another mini pentagram that blasted Hal with Blood Energy.
It surrounded Hal and attacked him but it might as well have been caressing him for all the effect it had before Hal summoned Executioner and slashed down to separate and move out of the midst of the Blood Energy.
But he did not stop there and sent an attack of Devil Energy to Arya.