Some players are on MinMax overdrive
“Okay, so he gets to make a dexterity saving throw… That’s a 16, so he manages to sidestep you and you take the full damage. …No, he doesn’t have disadvantage, you made a huge shadow above him, he knew you were coming. Anyway, he continues his monologue, using your actions as an example of the foolishness of humanity.”
you made a huge shadow above him, he knew you were coming.
Somehow I doubt it was established that the fight was at noon on the equator until that moment.
If it’s large enough to impose disadvantage on a Dex save it’s large enough to cast a noticable enough shadow to grant advantage, therefore a flat roll.
The dex save has nothing to do with size (beyond needing to be Small or larger to deal any damage at all). I assume the Disadvantage was because they didn’t see you.
Brontosaurus is gargantuan, so you’d have to do a lot more than side step to get out of the way.
Nope. The rules for falling on a creature don’t factor in size, except for if it knocks the target prone. The check is DC15 to dodge.
