In D&D 5e, can someone physically walk through a flaming sphere unimpeded (assuming they can stand the heat)?
FWIW: a flaming sphere 'occupied' a square in 4e, and in earlier editions it was considered 'spongy', but I'm not positive how it might function now in 5e.
Best Answer
No, you may not.
The description of the flaming sphere spell specifically states that:
This clearly speaks to the sphere's solidity. It's an object that has to move around obstacles, and leaps over pits (note that the spell says it jumps, not that it hovers). On top of that, it distinctly states that creatures that end their turn within 5 feet of it are affected, but does not state anything about a creature ending its turn in the sphere's square.