I brought a latcher from the mushroom forest in a dog crate back to Underrail. Latchers are pretty much the same as borers, they're both psimorphs. Given Ezra's knowledge about psimorphs, demonstrated when he helps with the issues in Foundry, as well as his refusal to elaborate on how he acquired that knowledge, I think it'd be interesting to probe him in conversation about a latcher. I'm not expecting him to admit to much or even anything at all, but it'd be neat to be able to try.