[0.2.11]
A claim that prohibits mobs griefing actions doesn't prevent the monstrosity from spawning lava sources and breaking blocks.

This may be used to grief. Also quite annoying to clean up after killing several of them in one place.

Other bosses from Cataclysm are likely to do the same, but they're not as essential as this one.

Sorry, just to add here:

• None of Cataclysm's bosses respect claims.
  I've captured most of them using ars nouveau, in the process all of them destroyed something in my claims