Norma enters. (Aria: "Ei tornerà" / "He will come back") Then Clotilde arrives with news that Adalgisa has failed to persuade Pollione to return. Although Norma questions whether she should have trusted her, she then learns from her servant that Adalgisa is returning and wishes to take her vows at the altar and that the Roman has sworn to abduct her from the temple. In anger, Norma strikes a gong-like shield as a summons to war. Trumpets sound and Oroveso and the druids all rush in, demanding to know what is happening. They hear Norma's answer and the soldiers take up the refrain: "Guerra, guerra!" / "War, war!", while Norma proclaims "Blood, blood! Revenge!"