As the first volleys turned to the second, the third, and so forth, the instant bow really started to showcase its power.
The speed at which the arrows were let loose made it seem like there were 10 times the men firing at the enemy, and the intensity of the fire made it quite hard for Perseus to continue up the hill.
Especially after the casualties he took following the first volley where, the hundred fifty (150) instant bow users let off their entire magazine at once, totaling a concentrated shot of seven hundred fifty (750) arrows, accompanied by 150 bolts from the crossbows, for a grand total of nine hundred (900) arrows fired, given a few seconds.
And what made it worse for Perseus was that this concentrated attack of so many arrows came from nowhere to them, at a time when his troops were caught out of formation and without their shields up as the phalanx units marched in a loose array up the hills.