"Dig a Hole" becomes possible on patches of clay. Output is flint and Raeli Tiles Raeli Tile quantity is very low - perhaps only ~1/minute at max rate. Tiles can be baked in a Vault Kiln throughout the greyscale specturm. Tiles can be tinted with glaze (from pigment lab) to follow other spectrums.
Pros Create any color of tile without finding the appropriate clay patch for a Raeli Oven. Work within the restriction zone around Raeli Ovens.
Produce tiles for Mosaics before Reali Technology is available.
Cons Very low output limits value in Funerary Temple. Vault Kiln is still an expensive building.