Wikia

Shadows of Undrentide (SoU) is the first of the official expansion packs.

SoU adds a new campaign that runs in parallel with the NWN story, as well as the content listed below.

New skills, feats and prestige classesEdit

Skills	Feats	Prestige classes
appraise craft trap tumble	arcane defense artist blind fight blooded bullheaded circle kick courteous magocracy dirty fighting divine might divine shield expertise extra music extra stunning attacks great cleave greater spell focus greater spell penetration improved expertise improved initiative lingering song luck of heroes rapid reload resist disease resist poison resist energy silver palm snake blood spring attack stealthy strong soul thug zen archery	arcane archer assassin blackguard Harper scout shadowdancer

Level	Bard	Cleric	Druid	Paladin	Ranger	Sorcerer/Wizard
0th	flare	inflict minor wounds	flare			acid splash electric jolt flare
1st	amplify Balagarn's iron horn	bane divine favor entropic shield inflict light wounds shield of faith	camouflage magic fang	divine favor	camouflage magic fang	expeditious retreat shield true strike
2nd		inflict moderate wounds	blood frenzy one with the land	aura of glory	one with the land	Balagarn's iron horn continual flame Tasha's hideous laughter
3rd	wounding whispers	continual flame inflict serious wounds	greater magic fang quillfire spike growth		greater magic fang	displacement gust of wind
4th		inflict critical wounds	mass camouflage		mass camouflage	Isaac's lesser missile storm
5th		circle of doom	inferno owl's insight			Bigby's interposing hand firebrand
6th	dirge	banishment greater sanctuary planar ally	drown			Bigby's forceful hand flesh to stone Isaac's greater missile storm stone to flesh
7th						banishment Bigby's grasping hand
8th		earthquake	bombardment sunburst			Bigby's clenched fist greater sanctuary sunburst
9th		undeath's eternal foe	earthquake			Bigby's crushing hand

Apart from the prestige classes and the campaign, the rest of the content added is also available in second expansion pack Hordes of the Underdark.