Not 'alive,' exactly - but there's certainly something about this place that can respond to us. After all, it only set the lava on you after you appeared, didn't it?

And it's not like this is the kind of place that should have lava at all.

It's definitely some sort of magical trigger.

[They continue to flit down the passageways until Viridi stops her -- ]

Like I said. Over there.

[A big ol' hole in the ground leading down.]