Bassilus the Murderer

Retrieving Bassilus' Symbol is a subquest in Baldur's Gate.

First you need to go the Red Canyons south of High Hedge and find Bassilus in the bottom right hand corner of the map. There is an undead army around him which he calls his 'friends'. He will hail you though he is actually talking to himself. Saying the right options will cause his undead army to collaspe and he will attack alone. Otherwise he and his army will attack. Once you have killed him, collect his Holy Symbol and go to the Temple east of Beregost.

Once you have arrived at 'Temple', enter the Song of the Morning Temple and talk to Kelddath Ormlyr. Give him Bassilus' Holy Symbol and in return you will receive 1000 xp and 5000 gp.