The Hold of Avarice
As quoted from D&D 4E Draconomicon:Chromatic Dragons
“Tiamat is the evil deity of wealth, greed, and envy, and the patrong of chromatic dragons. She ures her followers to take vengeance for every slight. Most chromatic dragons that worship a deity worship Tiamat. Tiamat requires that her followers keep a vigilant eye out for adherents of Bahamut – whether those adherents are dragons or not – and stamp them out at any cost. Her greed knows no bounds. She might even claim the hoards of chromatic dragons that do not pledge themselves to her. Of all the deities, Tiamat takes the most mortal consorts – always dragons. The dragons she chooses are usually chromatics, but she might court dragons of other families if they prove themselves to here.