Re: [Hydracula]
[It looks like there's been a hasty barrier rigged at the bottom— most of the door is blocked by a large slab of wood (the table?). It's definitely enough to prevent anything large coming through, but down in one corner, if you happen to be snake-sized instead of being a large, bipedal reptile, there's definitely a spot just big enough to slip through.
And just beyond, if it were to lunge a metre, maybe a metre and a half, is a definite heat source in the room beyond. Gentle heat, too—none of the flare of the torches.]