It's a fantasy role-playing game.

DM: You are Mollymauk Tealeaf, a tiefling blood hunter . You are the member of the famous group of adventurers. Previously, With all the enemies handled, you douses the flames on the dead priest's head and calls Caleb out of his withdrawn state. The rest of the party searches the room for any valuables.
DM: That's right, I forgot to put the undead guy on the initiative order which he would have gotten a round. We'll say you and him go simultaneously at this point since you engaged him.
Player: That's fine because that's a 19 to hit?
DM: That's a 13 to hit you. What's your armor class?
Player: 15.
DM: Yeah, even as it goes to strike at you with some sort of rusted battleaxe, you still manage to lift your foot out of the way and strike down towards it.
Player: This is with the good sword, so this-- ooh, so this is (counting) 13 points of damage?
DM: That's adding your wisdom modifier?
Player: That's adding my wisdom.
DM: That'll do it. You shatter it with a strike. As it attempts to swing towards you with the axe, you duck out of the way, spin around, and backhand it with your right enchanted scimitar, watching the bones (boom) explode and scatter across the ground. Like so many pebbles being thrown across the floor.
Player: With my off-hand, I'm going to take a swipe for the hyena over there.
DM: Go for it.
Player: Come on. There we go! 20 to hit.
DM: That hits. Roll damage.
