The king that does according to his will would be a new, conquering power. We know this from the other times in the prophecy that this phrase “do according to his will” is used. It has been used twice before in this prophecy. The first time it is referring to Alexander. “And a mighty king shall stand up, that shall rule with great dominion, and do according to his will.” Daniel 11:3. The second time it is referring to Rome. “But he that cometh against him shall do according to his own will, and none shall stand before him: and he shall stand in the glorious land, which by his hand shall be consumed.” Daniel 11:16.