Actually, some clerics worship Tiamat, and in Eberron, Tiamat is not an actual god. Directly from Wikipedia here: "In the Eberron campaign setting, Tiamat is a bound demon lord from the Age of Demons, when dragons and coautl worked together to bind the children of Khyber beneath the earth. She now sits imprisoned in the Pit of Sorrows on the draconic continent of Argonnessen, birthing evil dragonspawn and corrupting the good dragons who watch over her prison." Although there is a constellation named after her.
Furthermore, according to the source of this, and I forget exactly where this is from, but anyway, clerics get their power simply by worshiping. If you worship a false god, it doesn't matter, clerics get their power from the power of worship. So long as you don't know that you're worshiping a false god, you should be fine. However, like Criptfiend said, you can worship the
cause of a false god, even if you know that they're false. That's how I see it anyway. Of course if you don't think that you're a false god (you narcissist), then that's a different story.
Also, you think that you could have a hectic backstory? Just look at this direct quote from Races of the Dragon.
Eberron’s dragons are reclusive and cryptic, so no one knows what they’re thinking or what plans they’re laying. The Seren barbarians, who worship on Argonnessen’s shores, rarely encounter the objects of their reverence, but sometimes a dragon has need of an agent in the outside world. Very rarely, this need results in the appearance of a half-dragon among the Seren. The barbarian people treat such a being as a divine emissary, and he can actually venture into the hidden interior of the dragons’ continent, there to converse with his sire. Other dragons usually view such crossbreeds as abominations. If a dragon learns of a half-dragon’s existence, that dragon seeks the destruction of the half-dragon and possibly its sire.
See that, I was treated as a divine emissary by my barbarian tribe, while at the same time being hunted down by dragons for being an abomination. Sounds fun right? Not to mention that I've been traveling in disguise (hunted by dragons and all that), so one or two of you might not even know that you're working with a half-dragon
(That will be difficult to explain when we get back, if we get back. I bet that we get stuck down there in Xen'drik somehow.)
RAM,
here's a list of domains, if you worship yourself, pick and choose.The basic descriptions are in there, but if you want casting times and such, and if Criptfiend doesn't have them, I have a bunch of books.. Also, if you do choose to worship yourself, ask Criptfiend if you can have a custom flaw: Narcissism. I just made it up now.
For each round you see yourself in a mirror, you must make a DC 15 Will check or be fascinated. For each successive round you fail the check, you gain a +2 to the check.
You must spend 1d3x10 minutes getting ready each morning. If you do not get ready, you are inattentive and suffer -2 to Will, Spot, Listen, and Search.
Whenever you would choose to go prone or go into water, you must succeed on a DC 15 Will check or be unable to go prone or into the water for one round, for each successive round you spend in this way, you gain a +2 to your check. If you are in danger you gain an additional +5 to the check.
Bam, instant whiny bitch. What do you think? I want to know how this is as far as balance goes. It certainly explains your pathetic Charisma.
For reference:
Character sheet list