Spells like Blockade to aid dungeoncrasher?

I have a dungeoncrasher with plenty of UMD and very little terrain.

I’m looking for the lowest-level spell that can generate solid terrain, preferably as a swift action, at a range further than Blockade’s 0ft. My ‘best’ option so far is a 7th level Quickened Wall of Chains, which is rather terrible from a level standpoint, and rather overkill from a results standpoint.