This is an unofficial character available via the fan-made mod Unfinished Business for BG2.
It is not part of any official game.
Artemis Entreri will show up as a hostile creature in Bodhi's Lair at chapter 6 if you have asked Drizzt for assistance and have his component enabled in Unfinished Business mod.
He carries a unique dagger called Life-Stealer which is a cut content of the main BG2 campaign but can be obtained in The Black Pits II tier 4 store.
Gameplay[]
Artemis is invisible when spawned into the area - which is triggered by Bodhi's dialogue. His first attack will be a Backstab most probably.
He'll quaff a Potion of Invisibility before attempting his next backstab - and then try and do it again.
His potions are used for self-healing when a HP loss trigger value is reached. He can try this twice, for additional staying power.
Crossmod content[]
The Sword Coast Stratagems mod adds a new default fighter thief script to this creature for better backstabbing and targeting behavior. Weak and vulnerable targets are prioritized for attack - not necessarily the closest target to Artemis.