M'tarl was a drow lieutenant within Jarlaxle's Bregan D'aerthe.
1358 DR, while traveling through the deadly streets of  Menzoberranzan seeking valuable information to help the organization's cause, Jarlaxle and M'tarl encountered Gromph Baenre.
To have a private conversation with Jarlaxle, Gromph transported M'tarl to an extra-dimensional realm.
After their meeting ended, Gromph told Jarlaxle his lieutenant perished.  
↑ In the novel
, Gromph takes Jarlaxle into an extra-dimensional pocket and destroys a Siege of Darkness zombie servant with fire. While there is no concrete evidence this zombie is M'tarl, the question is still presented for the reader.
1.0 1.1 1.2 1.3
R.A. Salvatore (August 1995). . ( Siege of Darkness TSR, Inc), p. 43. ISBN 1-7869-0164-0. ↑
2.0 2.1 2.2
R.A. Salvatore (August 1995). . ( Siege of Darkness TSR, Inc), p. 42. ISBN 1-7869-0164-0. ↑
3.0 3.1 3.2
R.A. Salvatore (August 1995). . ( Siege of Darkness TSR, Inc), p. 48. ISBN 1-7869-0164-0.
Brian R. James and Ed Greenwood (September, 2007). . ( The Grand History of the Realms Wizards of the Coast), p. 142. ISBN 978-0-7869-4731-7. ↑
R.A. Salvatore (August 1995). . ( Siege of Darkness TSR, Inc), pp. 42–43. ISBN 1-7869-0164-0.