Oldschool Conversion of Newschool : Shadowdancer Prestige Class for Thieves

When a thief has enough experience points to attain 8th level they can choose to prestige class into Shadowdancer; they lose any progression past 7th level thief abilities in backstabbing, climb, pick locks, and remove traps; they do not gain the ability to use scrolls; and they lose any future stronghold or follower benefits. They keep the same hit dice, attacks and saving throws, and gain the following benefits at the following levels (as per the 3E Shadowdancer Prestige Class):

8th level - Hide in Plain Sight
9th level - Infravision
10th level - Shadow Illusion, Summon Shadow
11th level - Shadow Jump
12th level - Defensive Roll
14th level - Slippery Mind

Prerequisite: When a seventh level thief has gained enough experience points to advance to 8th level, and they wish to become a Shadowdancer, they must unabashedly perform The Dance of Shadows for the other players' and the DM's entertainment in order to qualify for this class.

Or, if your game uses them, the character must blow a non-weapon proficiency or skill on Dancing.