Iron golem

Obsidian has confirmed that iron golems will be included in NWN2.

Breath weapon
10-foot cube, cloud of poisonous gas lasting 1 round, free action once every 1d4+1 rounds; initial damage 1d4 constitution, secondary damage 3d4 constitution, Fortitude DC 19 negates. The save DC is Constitution-based.

Immunity to magic
An iron golem is immune to any spell or spell-like ability that allows spell resistance.