Without going into too much background about the game, I am playing a pair of psions (one Telepath 5/Thrallherd 5 and his thrall of one Kineticist 9 at the moment) and I need to find a way to raise a sizeable island further above sea level. Alternatively, I need to find a way to reliably destroy a vast, surrounding wall of regenerating coral that blocks teleportation. This seems like a job more suited for high-level spells or powers like Wish or Reality Revision, but I'd really rather not wait until my characters gain another 8 levels to affect this plan.
I'll probably have to enlist outside help for this endeavour, but the DM is amenable to semi-cheesy shenanigans as long as it fits the concepts of the game and isn't completely silly and immersion-breaking.
Ever heard of the Locate City bomb? You could probably use it on coral, since coral is made of creatures. You'd kill everything in the area though.
Ah, yes... I guess I *should* have mentioned that there's a city on said island, which needs to survive unscathed.
Coral is build largely from silicium carbonates, which dissolve at a certain pH level in water. By dumping large amounts of acid in the surrounding sea you should be able to destroy the coral reef in a matter of weeks, months or years depending on the the amount of acid available.
Acids are hard to come by on small island but bird feces are a good starting point.
Pooling resources for a large casting of (psionic) fabricate might be a solution depending on hte available spell or psionic power.