It's a fantasy role-playing game.

DM: You are Pike Trickfoot, a gnome cleric . You are the member of the famous group of adventurers. Previously, Many of the townsfolk gathered at that square were immediately killed. The party, as well as a few other straggling survivors, ran away as both the gargantuan black and green dragons began to chase  them  down.
DM: Okay. So as you reach out, you feel Sarenrae's warmth come to you, wordless. Attempting to comfort, but even then there is a trepidation in Sarenrae who is, you gather yourself, still taking in the circumstances that have happened. You feel that warmth begin to coalesce into a specific form, and everyone who has come into the temple with you gasps aloud as over these central worship platforms in the center of the temple, a glowing orb begin to form that then slowly takes the form of a humanoid with wings, similar to the ones you've worn in your celestial form. As the light fades, you can see, levitating roughly a foot off the ground, a human. White eyes and pale blue skin, hairless with a simple breastplate that's silver with gold lining on it, a single sword sheathed on the side, and beautiful white angel wings sprouting from its back. The entity stands there and looks down towards you. "I have been sent to your aid. Are you, Pike Trickfoot, to give me a task?" The voice itself seems otherworldly, and understanding the basis of the spell, you need a specific task in mind for it, and it is expensive to maintain in materials, the longer the task requires.
Player: Okay. We need your help. As you can see, our city has fallen to pieces by these dragons that are attacking us. And we ask that you aid us in battle somehow.
DM: "Lead me to a battle if you wish. I haven't much time on your plane. If you have a task that I can complete at this moment." And you know that to maintain this spell cost about 100 gold per minute.
Player: Okay. Ah, shit. Okay.
DM: Or 1,000 gold per hour depending on the-- Or 10,000 gold per day. Yeah, it depends on the task it required. It needs to be a little more specific than just "aid us in battle," because if there isn't a immediate battle happening, because the longer it's out, the more expensive it will be. You asked it to rebuild and it looks to you and says, "If you require my aid in rebuilding..." She looks with her head around the temple. "This I can help with quite a bit of haste, as it is within the realm of our patron lady."
Player: Okay, well, yes. Rebuild our keep.
DM: "It will be done, within the hour." So you can mark off 1,000 gold worth of materials, and at this point, the Planar Ally's wings unfurl and begin to float up, and as it does it lift its hands and all the shattered stained glass begins to lift off the ground with it. And you watch as they all begin to reform.
