Trollsbane should be the second artifact gift for the Geek role.

Merge Sunsword and Trollsbane like NetHack Fourk does (a single artifact that emits light, instakills gremlins and instapetrifies trolls, with bonuses to undead), except keep it a morning star and name it Sunflash (because a lot of these consolidated effects have nothing to do with trolls). Having it stay a morning star makes it an attractive choice for Priests, and raises the appeal of training morning star.

Trollsbane can be invoked to instapetrify all trolls in a radius of 5.

Trollsbane blocks intrinsic or extrinsic aggravate monster.