Spelljammer Spelljammer Ships and Damage

[R_J_K75]

That's pretty much EXACTLY what Damage Threshold is in 5E: You have to beat the Damage Threshold when you do an attack to do damage. If you can meet/exceed the Damage Threshold, you deal zilch damage to it.

Yeah, I found it in the DMG after doing a google search. I would have been nice for a (see pg "x" of DMG). It's a rather obscure rule that I probably haven't come across since reading the DMG in 2014. Then again, I don't typically run WotC adventures.