i actually missed this the first time around, and like the idea of a pillar with a very weak/situational ability (either when it comes into play or throughout its existence), but i think the key would be keeping the abilities very weak- this card giving out a free burrowed creature may be a bit much. and then again, voters rarely vote for cards balanced at the 'weak' end of the scale, so submission to the crucible i agree would probably be a wasted effort.
alternatively you could just do a revamp of sorts and have a 'series' (using the term loosely) where you pay for a pillar/pend/tower but it produces more than 1 quanta per turn. basically it requires some start-up cost, but benefits you more than a free one. just a thought.