The last bulletpoint in the contest guidelines says that only one submission from each competitor will be considered.
Also, am I the only one having trouble settling on one spell? I just went through the SRD and have four spells just from level two and three spells that I have pretty nifty ideas for. :/
Any advice from others here? Should I choose to challenge myself with a trickier spell, or go with the one I have the most mechanics planned out for? For instance, so far I have ideas for PrC's based around Shatter, Blindness/Deafness, Bestow Curse, and Rage. Rage would be tricky, since there's already the Rage Mage PrC (which, as most people agree, sucks). There's already one Rage Mage fix out there, but my class would probably be going in a fairly different direction. I'm thinking this is one I should save for outside of the contest so I don't have to worry about originality issues.
Blindness/Deafness and Bestow Curse are both fairly similar, thematically, and my ideas for both are somewhat similar but still rather different. Both could prove tricky but would yield results I'd like to play.
Shatter is currently the spell option that seems the most well-rounded, and thus potentially the least challenging.