It's a fantasy role-playing game.

DM: You are Tiberius Stormwind, a dragonborn sorcerer . You are the member of the famous group of adventurers. Previously, Vox Machina managed to fly over the main part of the camp, but the duergar will reach them shortly. Vox Machina briefly take care of the wounded and unconscious before running towards the back of the camp, through the buildings, to the main tunnel.
DM: You all manage to push towards the back of the entire war camp, into this tunnel. Hearing behind you the distant echoing shouts of approximately 30-plus duergar heading in your direction. You hear a few other ballista bolts hitting the wall above you of the stone.
Player: Are we all in the tunnel?
DM: You guys have now pushed into the tunnel.
Player: I wait for everybody to pass and I cast all my Grand Columns.
DM: Okay, how many can you--
Player: Three.
DM: Three per spell? And how many spell levels do you have currently?
Player: That's it, that's what I did the SP for, so that I could cast this right now.
DM: Right. So you have one.
Player: I have none in my column.
DM: Right. How many spell castings did you have left? Two?
