Price 2,000gp; Slot none; CL 10th; Weight negligible, Aura Weak(Transmutation/Summoning)
Poke a hole in the ground that you are going to build on, push the bean in and water it. After a hard day of work, when all of your builders go home, ghost spiders come out and scuttle about all over your new building. In the morning, extra little bits of work have been carried out, minor construction faults fixed and some areas just look much more finished. You will never see the spiders during the day, and once the building is finished the ghost spiders disappear for good – although there might well be normal, everyday, spiders that take up residence.
Effect: Reduce the cost of a building by 0.5bp – to a minimum of 0.5bp. One bean per building.