 Mask of the Betrayer is an expansion pack for Neverwinter Nights 2 and its core gameplay is identical . The game uses the 3 @.@ 5 edition rules of the tabletop role @-@ playing game Dungeons & Dragons . Players can create a character from scratch and make use of Mask of the Betrayer 's new races , classes , and feats , or import an existing character from Neverwinter Nights 2 . Characters must be at level 18 to begin the game . The level cap has been raised from 20 to 30 , allowing for epic level characters and accompanying prestige classes and feats . Mask of the Betrayer features all of the races from Neverwinter Nights 2 , as well as introducing two types of elves ( the wild elf and the half @-@ drow ) , and four types of genasi . It also contains two new base classes , the " favored soul " and " spirit shaman " , and five new prestige classes . The game adds more than 100 new feats and magical spells to the base game . 
