Tiamat

The Avaricious, Bane of Bahamut, Creator of Evil Dragonkind, The Chromatic Dragon, The Dragon Queen, The Dark Lady

Unlike priests of other faiths, the worshippers of Tiamat perform daily rites to their dark lady. Other priests gain their spells by praying daily, but followers of The Dragon Queen instead leave donations to her hoard. This is called The Tithing.
Each day at the end of their prayers, a follower of Tiamat must put a small amount of gold or gems into a cup. Upon finishing the ritual, the tithe disappears.
There is no set date upon which a follower must perform the complicated Rite or Respect, but it must be performed at least once a year. The ritual must be performed in the lair of a chromatic dragon and only perfection will save the priest from draconic wrath.

Divine Classification

Trickery Domain

Alignment

Chaotic Evil