Hoar

Hoar, or Assuran in some parts of Faerun, also known as The Doombringer or The Poet of Justice, is a vengeful god of retribution, who's whole philosophy is "An eye for an eye." 
Description
Hoar's avatars take on many forms, but his best known is that of a tall man wearing golden bracers, dressed as a rich man from Unther in Eastern Faerun. The eyes of this figure are jet black, and his hair is long dark strands and a pointed goatee. 
He appears to be a man tired and battered, with poorly healed, or usually still bleeding wounds across his body. Usually the first thing anyone hears of him is a dry, humorless laugh as he approaches. 

He wields a giant +3 broadsword (with other enchantments upon it), named Hand of Retribution and carries on his back an endless sack of javelins of lightning. 
Three rolls of thunder in quick succession often means that Hoar, or one of his favored champions, has gotten retribution for a previous wrong. At times, certain places of justice will ring out bells three times upon punishing criminals to show that what they are doing is a just act. 
Servants of Hoar are various aerial servants, invisible stalkers, cursts, feyrs, harrlas, haunts, justice incarnates, keres, living steels, revenants, lhiannan shee, and maruts.

Personality

Hoar is a violent god, known for mood swings, and bitter humor. He likes to exact his revenges through misfortune or cruel irony. He prefers illusions and charms, to help with the latter forms of vengeance. 
When he claps his hands, or stamps his feet, it creates a deafening wave of thunder. 

Divine Realm
Hoar holds his Doomcourt on the plane of Mechanus. His palace, made of frosted colored marble, is decorated with the heads of mortals who have been targets of those whom he sought vengeance upon. This is done, however possible, in a somewhat tasteful manner, evoking both awe and fear to those in his halls, but not intended to disgust. Beyond these morbid trinkets, the palace is that of a mansion to guests who are allowed entrance. 
For a time after the Spellplague, Hoar had been an exarch of Bane, as was his hold moved to Banes court, but after certain events in Unther, he was restored to godhood once more, and his palace brought back to Mechanus. 
Worshipers
A deity originally only worshipped in Unther, there are few temples elsewhere in Faerun to Hoar. On the Sword Coast, in Baldur's gate, there is a small shrine to Hoar. Even there, he usually has few clergy and the few temples there are, are small. He is instead worshipped by the bitter tears of those whos loved ones are cut down in the street, those whose life-long plots are foiled after they escape, and those who wish to rise up against their masters, whether cruel or perceived as such. 
Those who are 'priests' of Hoar are rarely clerics, though some war clerics take up his symbol. They are bounty hunters, assassins, revenge seekers, guards who don't believe the laws of mortals are enough to intact justice, any who work outside the law to get revenge or help others to do so and ask his favor in their efforts. 
A few travel from Unther to bring his ideas to those who otherwise wouldn't realize his power, and by spreading his world, and his symbol of the two faced coin, are strange individuals, though they usually are all at peace, having settled a long forgotten grudge. They have a knack for finding those who seek the path of vengeance, but either cannot go it alone, or who have not realized the path was there to walk. 
Hoar does not believe that justice stops at the law. He encourages his followers to get revenge by any means. If they can do so with cruel irony, all the better. But stopping at the law is something true worshippers understand is not an option, and so many of those who are devotees of him are criminals in one way or another, though the common person, knowing the context, may not think of them as such. 
One notable worshiper was a 15th century vampire named Twilight Knight, who resided in Westgate. 
Holy Days are only observed in Eastern Faerun, usually close to Unther, though for those who find themselves freed from their vengeance, usually it is customary to celebrate in some way to the god. 
Relationships
Being a god of vengeance, Hoar has a strange relationship with gods. 
Tyr and Shar have both tried to influence him. Tyr wanting him to embrace his just side, but not to any extent, and Shar tries to get him to embrace the side that is the Doombringer. Both have failed to pull him to their ways of thinking, and only found his disinterest in response. 
Tymora, Lady Luck, is both someone Hoar seeks to befriend, as well as a bitter enemy. He wishes for good luck in his endeavors, and of his followers, but she is also found to help those who wish to escape revenge. 
As for her sister, Beshaba, she and Hoar are quite close, he enjoying her bringing poor luck on those whom he hunts, bringing them to ironic ends. 
Shevarash, the elven god of revenge, is a close friend of Hoar as well, though his focus is much more against the drow.
For many deities, Hoar is too set in his ways to befriend, others that enjoy his more cruel side find him acting too good, and those who enjoy justice find him going too far for it. He is not a likeable god for many mortals and immortals, but those who do befriend him find themselves a staunch ally.