Prerequisite: Survive Zariel's memory within the bleeding citadel and tell Zariel that you would not do as she did and risk everything to stop the demonic flow.
Due to your choices within the memory instance with Zariel, she has blessed you with the following benefits.
Greater Restoration. You learn the Greater Restoration spell and can cast it 6 times without expending a spell slot. Once you have expended all uses the blessing fades.