It's a fantasy role-playing game.

DM: You are Vax Vax'ildan, a half-elf rogue . You are the member of the famous group of adventurers. Previously, The pit fiend is not harmed as he is immune to fire damage. you hears the creaking sound of a gate opening and turns to see a bone devil entering the hallway.
DM: But he took 23 free damage, which is nice. Vax, he's going to take three attacks on you. That is a 27.
Player: Yeah, that kind of hits.
DM: All right, that is a 20.
Player: That does not hit.
DM: And with the tail, that is a 24.
Player: That also hits. I will use Uncanny Dodge for the tail.
DM: Okay. So the first claw hits you, you take 11 points of slashing damage, and as the first claw strikes you across the chest, the second one, you manage to duck right out of the way, it slams into the stonework, and as you glance up, you try and dodge and roll out of the way as the tail scrapes you across the back. That is 18 points of piercing damage, reduced to six, and you would have the possibility of becoming poisoned; however, you guys are still under the effect of Heroes' Feast, so that does not affect you.
