Version 100.17.22308.0 (481060R) -
The god power Gullinbursti will fail to spawn the eponymous unit but nonetheless be put on cooldown and extra favor cost if cast upon the foundation of a building (with the exception of walls) - that is, not one that is already under construction and has a hitbox which units cannot pass through, but the foundation you get when you issue an order to build a building but before a villager actually starts working on it. This includes both friendly foundations and enemy foundations.