Be'lal, (BEH-lahl; The Envious or Netweaver) formerly known as Duram Laddel Cham, is one of the thirteen Forsaken who were trapped at Shayol Ghul due to the Dragon's sealing. He used the alias Lord Samon in Tear.
Little is known of Duram Laddel Cham before he turned to the Shadow, although his skills indicate that he was a powerful force for the Light. Called The Envious, he was a master swordsman and manipulator. He was an advocate and a friend of Lews Therin Telamon. Together, they revived the ancient and forgotten art of swordfighting, and fought together against the Shadow before his jealousy of the Dragon drove him to swear his soul to the Dark One. Later Be'lal's mastery of manipulation earned him the name Netweaver.
During the War of Power he and Demandred led massive attacks in the areas where the Choedan Kal were built, but failed to retrieve the access ter'angreal. He was probably among those who razed the Hall of the Servants in the war.
After his escape from the Bore, he soon adjusted to the political scene of the new world, and maneuvered himself into the position where he could pose as a High Lord of Tear under the assumed name of Lord Samon, in effect ruling Tear.
A more skilled manipulator than Rahvin and more deadly than Sammael when dealing with enemies in open combat, he planned to lure Rand al'Thor, the Dragon Reborn into the Stone of Tear. He wanted Rand to take possession of (and thus release the seal on) Callandor, so he could then steal it from Rand.
During the capture of the Stone of Tear, he fought Rand with a dark heron blade sword made from the One Power. He used the Power as a secondary asset, mostly defeating Rand with highly advanced swordsmanship - that of a true blademaster. His skill was too much for Rand who was saved by Moiraine Damodred when she blasted Be'lal with the dreaded balefire, though Be'lal's intention was not to kill Rand, and he was likely safe from any sort of mortal wound. Forever burned away from the Pattern, he is now out of reach even for the Dark One.
Be'lal is likely a reference to Belial, one of the seven princes of Hell in Christian and Jewish apocrypha, or the name might be deriviated from the Kanaan cult for the deity Ba'al.
As a word, "belial" may also be used to describe someone who is extremely wicked or iniquitous.