Berserk hurt

A man with a red alchemical transmutation circle on his neck is shown in a close-up, then the scene cuts to him fighting a large, monstrous creature with a gaping maw full of sharp teeth. The man, covered in blood and wielding a sword, is attacked by the creature, which bites down on his arm, causing a violent spray of blood as the blade is driven into its mouth. The setting is a dark, cavernous environment.