I've been looking through the Tales from the Yawning Portal book and am thinking about running the Against the Giants adventure; specifically in The Glacial Rift of the Frost Giant Jarl dungeon, it talks about slippery ice on page 181:
Slippery Ice. Fireball spells or other fire effects used in these icy areas will make the footing within the area of effect very slippery. A creature hit by an attack or that moves more than half its speed over slippery ice must succeed on a DC 10 Dexterity (Acrobatics) check or fall prone. For 5 minutes after such magical fire is used, the area will also be filled with fog that renders the area heavily obscured.
So, in short, using fireball can partially melt some ice and make the floor slippery. For spells like fireball, this makes sense to me, since it's an area of effect spell, but when the text says "or other fire effects", would this include spells like fire bolt as well? Or would this be down to me as the DM to arbitrate (for example, I'd rule that create bonfire would cause this effect because it touches the floor, but fire bolt wouldn't because, assuming it hits, it only touches the creature)?