。！
Damn! Attack!
Literal
Damn! Attack!
かかれ is the rough-imperative form of かかる ('to come at, rush at, engage'). Along with forms like やれ, 行け, 逃げろ, this is the sharpest command form in Japanese — reserved for shouted orders, combat, and very rough speech. クソ is a moderate expletive. Both signal a combat scene.