John Gill Commentary Isaiah 47:12

"Stand now with thine enchantments, and with the multitude of thy sorceries, wherein thou hast labored from thy youth; if so be thou shalt be able to profit, if so be thou mayest prevail." — Isaiah 47:12 (ASV)

Stand now with your enchantments, and with the multitude of
your sorceries
An ironic expression, deriding those evil arts, bidding defiance to them, calling upon the masters of them to do their utmost by them: wherein you have laboured from your youth ;
from the infancy of your state; as soon as your monarchy was founded, or they became a people, they were given to these practices, and were famous for them; and in which, no doubt, many among them were brought up from your youth; and to gain the knowledge of which they were at great labour and expense; and yet it was all in vain, and to no purpose: if so be you will be able to profit, if so be you may prevail ;
if skill in these things can be of any advantage to keep off the impending calamity, and fortify against the powerful enemy that will quickly surprise you; try if by your art you can foresee the danger, and prevent it.