"Nine Hit Strike!"
The unseen force was, in fact, Merlin's Mind Power fluctuations. Lately, he had been focused on fusing Mind Power with his instincts. Therefore, no matter what situation he faced, he was ready to unleash his Occult Mind Spell at any time.
Moreover, Mind Power had no shape nor shadow, and was very fast, far beyond anything a spell could match. Thus, when dealing with a sudden, unexpected occurrence, casting an Occult Mind Spell was of utmost suitability.
Wave after wave of Mind Power attacked without sound or shadow. The rest only saw that the dense crowd of Dora Demons shrieked in a blood-curdling manner, following which their bodies seemed to be crushed by an extremely terrifying force, exploding into mists of blood instantly.
Merlin's Occult Mind Spell was now cultivated to Four Hit Strike, which was a fatal threat to most Ninth-level Spell Casters. As a result, these ordinary Dora Demons could not even withstand one blow.