Moorcrys
Explorer
Just glancing at the white dragon entry, if I were an adult white I'd seal up my lair with ice whenever I was in there, particularly if I didn't have any minions - the white dragon has both a wall of ice legendary action and one of the regional effects is that icy walls block off areas of the dragon's lair (that it can break through without effort). I'd say that all entrances to the white's lair (except *possibly* the main entrance, except even then I'd seal that up if I were alone) would be sealed by the Region Effect: Icy Walls. The sounds of adventurers smashing away at the walls would trigger its legendary perception checks or give it a few moments to position itself as well as prepare - set up freezing fog, cast its *1* potential 4th level spell due to its 12 Charisma, etc. ;-)
I'm sure it'd get crushed anyway by a well-prepared party, but at the very least I'd make it almost impossible to surprise or surround a dragon without a ton of effort.
I'm sure it'd get crushed anyway by a well-prepared party, but at the very least I'd make it almost impossible to surprise or surround a dragon without a ton of effort.