Note: This information only applies to the older 1.1 version. The version of your copy can be found on page 1 of your rules booklet. The Dungeon Run download currently in the BGG files section is the most up-to-date version.
The version 1.1 card for the Lich should say 'Immune to Brawn' and the Dragon should say 'Immune to Magic'. This will be fixed in the 1.2 update.