It's a fantasy role-playing game.

DM: You are Grog Strongjaw, a goliath barbarian . You are the member of the famous group of adventurers. Previously, A couple of hours later, the ship comes upon an unnatural-looking fog bank in the ocean. Adella tries to veer around it.
DM: The fog is still in this vicinity right now. So, you're under the effect of a Fog Cloud spell... for the area. So, basically, the area around is heavily obscured. So that will increase uh, AC to a number of individuals. Perfect. All right, so. So first off, this elemental rushes forward to Grog, splashes around in your direction. Grog, it's gonna go ahead and take a series of swings at you.
Player: Sweet.
DM: Yeah, it's gonna take two slam attacks. That is a 23 to hit?
Player: Hits.
DM: And an 18 to hit.
Player: Hits also.
DM: All righty. So you suffer 12 points of bludgeoning damage. That's full damage. You're not raging.
Player: Nope.
DM: And that is 15. 15 points of bludgeoning damage.
Player: Total? Or 12 and 15 both?
DM: 12 and 15.
Player: Gotcha.
DM: All right, that ends that guy's turn. Next up is Vax and Vex.
