It's a fantasy role-playing game.

DM: You are Caleb Widogast, a human wizard . You are the member of the famous group of adventurers. Previously, They are  pulled into the center and announced as The Mighty Nein's final round. Knowing the Stubborn Stock is watching from behind the distant doorways that lead into the central arena,  the members of the Mighty Nein  all scattered about the sands as the sun begins to get close to dusk, shouting out  their  various plans and then abandoning them last minute.
DM: That adds plus five to your AC, so it's 19 on this attack. That's still a 21 to hit though, so it still hits you. 13 plus eight, sorry.
Player: Well bring it on, here we go.
DM: As this chunk of the pillar goes flying across the arena towards you, it hits the top of the wall, which breaks, and a good foot and a half section of it, shatters as it slams into your chest.
Player: What did it do, it did to 19? I can do a reaction, can't I?
DM: You can.
Player: I cast Shield.
DM: All right! There you go. As you see it slam into the wall above you and go swinging, you throw up the shield and all of a sudden there's a spark of arcane energy as it gets deflected inches off of the top of Caleb's head before slamming into the side of the actual tournament arena, hitting the stone, causing it to crack, and people in the front area (gasp).
