Originally Posted by
Vargouille
I looked Real Hard at some DCs and tested in various means and ways.
...<stuff>.....
Monsters in Epic Elite get a special bonus to save against magic, and only magic, while they are healthy. This doesn't affect non-magical effects. There's a similar but smaller bonus on Epic Hard.
"Magic" in this case means all spells, and possibly some other abilities/effects that we've explicitly marked as magical over the years.
This starts at +6 to saves, drops to +4 once the monster is hurt at all, and then to +2 when between 50% and 75% health. Below 50% health they receive no bonus.
...<stuff>...