Indeed, the warning was needed as Rokurou was ready to just go in for the kill. Unfortunately that had momentarily blinded him from realizing that it wasn't just it shaking the ground—it had a whole body laying in wait and was the true source of disturbance. Before he could pull his blade away from getting trapped, the roots shoot up and he was forced to let ago and jump back or else he'd be skewered.

"Shit, there's more to it!?" A surprise and a bit annoying...but it quickly changes as he grins. "Fine, just means it's even bigger challenge than expected!"

He might have lost one sword, but he still had another. "Time to see how much it likes fire!"

A fire that was now ablaze as he dodges yet another attack before rushing through, activating one of his artes as he zig zags over the ground, stable or not. All he needed to do was keep moving, keep jumping, and keep things burning.