Cyric

Cyric also known as prince of lies is current Faerunian deity of Murder. He had gained this status through killing Bhaal during Time of Troubles with help of deity Mask transformed into a sword.

He appears in Throne of Bhaal during 4th test of Pocket Plane where he questions you about whether you want to assume godhood and your plans about it. He then summons few assassins to "test" you before disappearing.