Ilman couldn't oppose that sudden, direct hit. He literally lacked the physical prowess even to think about achieving such a feat.
However, after Ilman lost his foothold and began to fly backward, he adjusted his mana's consistency, making sure no friction force could ever attempt to slow him down.
That was because the branches were still stabbed inside Ilman, so any opposition to that unavoidable retreat would increase their piercing might. His [Blood Shield] was already reaching its limit, so he couldn't allow his defensive technique to be stressed any further.
The backward momentum and constant acceleration flung Ilman far away, past what the immense crown had previously covered. The stabbed, ever-stretching branches also failed to keep up with his speed at some point, so his body slipped out of their sharp tips.
Ilman chose to retreat even further after breaking free, only to spread his arms and legs once he confirmed that the sharp roots weren't chasing him anymore.
