hello thank u, in exchange please accept this picture of a lizard licking him own face.

He'd be assessing the sinkholes to see how likely they are to screw up the structural integrity of the buildings they're in and around, or if they're at risk of an iminent further collapse, then use his fancy magic chest bullshit to reinforce/fill them so they can hopefully rebuild without fear of a repeat. Or, alternatively, tell them if the ground is way too fucked up to be safe and suggest they relocate things elsewhere.

Then, you know, help do a build.