transtemporal
Explorer
Nah, flaming sphere isn't an obstacle. Its just formless, incandescent ball of flame. In our last session, the DM ruled the sphere provided 1/2 cover due to basically blinding you trying to shoot at something on the other side.
Technically, you could have enemies move through it without taking damage as long as they didn't end their movement within 5. But I would call BS on that for most enemies, since it looks like a giant magical bonfire and logic would dictate you'd burn yourself moving through it, so they wouldn't risk it just to test the theory (unless they specifically knew the spell). What I might have them do is dash and jump over it though. That seems like a legit move.
Technically, you could have enemies move through it without taking damage as long as they didn't end their movement within 5. But I would call BS on that for most enemies, since it looks like a giant magical bonfire and logic would dictate you'd burn yourself moving through it, so they wouldn't risk it just to test the theory (unless they specifically knew the spell). What I might have them do is dash and jump over it though. That seems like a legit move.