Slippery Mind

While Obsidian has not confirmed the existence of slippery mind in NWN2, it is a class feature of both the rogue and shadowdancer class which have been confirmed.

3.5 Defensive roll
A character with this feature can wriggle free from magical effects that would otherwise control or compel her.

If the character is affected by an enchantment and fails her saving throw, 1 round later she can attempt her saving throw again. She only gets this one extra chance to succeed at her saving throw. If it fails as well, the spell’s effects occur normally.

External resources

 * NWNWiki:Slippery Mind