Further House Rules and Clarifcations:
Character's gain their home regions languege for free. (That's Chondathan in Amn and many places to the north. Consult Player's Guide to Faerun or ask me for help if needed.)
Half Dragons are +4 ECL for this game. Their breath weapons are based on total hit dice, not just racial.
Campaing Specific Trait:
Draconic Lungs: Your half dragon character is strongtly in touch with her draconic ablities. She may use her breath weapon 2 aditional times a day, but must still wait 1d4 rouns between uses.
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I haven't read the stories with Obold Many ARrows becoming Chosen of Gruumsh, either. When I've used him in the past, at the climax of the war the Orcish forces were storming Silverymoon and Alustrial made the Moonbrige vanish, plunging Obold and his elite gaurd into the River Rauvin.
We all know that villains who plumet into icy cold water from a greath height never come back, right? :)