The elemental ignores the gas (natural 20 Fort save). Snydil can breathe in round 505.
Round 502: The elemental zips down to ten feet above Snydil, buffets him (rolled 33+1=34 for HG) for 16 points of damage, and zips back up to 60N30E25Z. Snydil has 77 HP remaining and is at 65N30E.
Round 502: The elemental zips down to ten feet above Snydil, buffets him (rolled 33+1=34 for HG) for 16 points of damage, and zips back up to 60N30E25Z. Snydil has 77 HP remaining and is at 65N30E.