Shadowthief

About
You stand in the middle of a dark alley standing over the latest fool who insulted you. You pull your dagger out of his back and spit on his corpse. After taking all the valuables you can find on the corpse you lay low in the shadows. You see your mark walking down the street with tons of loot on them and you smile demonically in anticipation of the wealth you are about to acquire. You stealthily leave the alley in pursuit. As you reach for the poor fools purse you trip and stumble, and low and behold are snagged. The fool begins to attack but you smile grimly, say a prayer to the lords of darkness and evil, and smash him into the ground with a dark fist. You cackle demonically as you dodge his oncoming attacks with the precision in which you were trained and another prayer comes to your lips as you send the hatred of the nine hells towards the fool and watch as his mind crumbles under your spell. As you pick the fool's corpse clean you give thanks to the Gods of Darkness and Evil for their help in this victory.

You arrive back at your guild in Lirath and reflect on exactly what a Shadowthief is. A shadowthief is cunning, dexterous and intelligent. Other fools use brute strength or only spells to destroy their enemies, but your gift is the shadows and the powers granted you by the Gods of Darkness and Evil. Your home is the darkness and your strength is your stealth. You are the unholy hand of thievery.

Below is information from the RoD era and should still apply.

Minimum Stats
Dex 15

Races
Drow, Dwarf*, Duergar, Half-Elf, Halfling, Half-Orc & Human
 * Since Dwarves are good by nature on the realms, they are a questionable choice for the guild as any Duergar's may hunt you down for being a ST.

Alignment
Evil (Recommended)

Armours
Restricted styles: chain mail, banded mail, plate mail & full plate.

Rearranging
??? Dex 10, Int 10, Con 5 Maybe Dex 15, int 10