You use powers of divination to target your enemies.

Benefit: When you cast a divination spell, you gain a +1 bonus on all attack rolls to hit targets radiating an aura you perceive. You may concentrate on your divination spell while attacking as long as you only attack targets with radiating auras. For example, a paladin detecting evil gains a +1 bonus on all attack rolls to hit any creature that radiates an evil aura. As long as he is attacking targets radiating an evil aura, he continues to concentrate on detect evil.