It's a fantasy role-playing game.

DM: You are Keyleth, a half-elf druid . You are the member of the famous group of adventurers. Previously, They both fly down towards you and attempt to sting her but fail. you casts Shapechange and becomes a fire giant, her sudden growth pushing Tova and the imps away.
DM: So, Tova and the imps get pushed aside as Keyleth's form suddenly encompasses most of the corner of the room. Natural 20. You grab Utugash by the throat. Grab the torso, lift him up, slam him onto the ground. Go ahead and roll just the basic damage for the fire elemental's attack. It doesn't knock him prone, but this is the flavor for the attack.
Player: How do you know what basic damage is?
DM: Look for the attack for the fire giant.
Player: Well, it just gives me multi-attack.
DM: And underneath that, it says?
Player: And it gives me a greatsword melee attack.
DM: Yeah, just roll the damage for the greatsword. The attack is the flavor of the strike.
