In my kingdom that has finished the event, all crafts remain except summoning Liam. I haven't tried to spawn a gnome from my sparkling mines or sawmills. You only need these to craft the rainbow dust which you use to make "save the emerald gnome" and the Leprechaun suit. To make more of the gold digger gnome, you need blocks and beams (made with the gold clover from the trees) and rainbow thread from the fawns.
HTH,
trudyscandles