People ... you don't understand... they forgot the magic, EVERYTHING!!!
It's a common scenario, an established cliche. Remember all those amnesiac thrillers, when the hero awakens in a lunatic asylum and doesn't remember anything. First he only screams and howls, clawing the padded walls, the orderlies come to sedate him, he manages to fight them of barehanded, runs away, grabs a metal pipe protruding from a wall, beats security with the pipe, gets their guns, shoots more security with the guns, gets submachine guns, escapes in a car, pursued by helicopters and SWAT teams, only to be rescued by a random busty female "resistance" member who explains him that he is actually "The chosen one" / retired ninja / celestial avatar / son of Satan / former karate champion / lobotomized Vietnam veteran, and that the govt was too afraid of him to kill him so they brainwashed him instead. The hero remembers all his awesome skills, grabs his awesome gear that somehow survived it in a secred stash, and after a quick sex scene, he proceeds to plough through whole armies, leaving gore, skull splinters and blood splashes in his path.
But remember... IN the BEGINNING.... he CAN'T do ANYTHING!