Empress of Light
Placing the anvil is actually pretty finicky, I apologize. If you keep trying to place it on three wide spot, try each block it might occupy, and it should work eventually. If it really REALLY doesn't place anywhere, tell me.I can't place the Thorium Anvil. Anywhere, at all, no matter how much room there is. Not on a platform, grass, wood, stone bricks, glass, in there air, anywhere.
Does it have some kinda of special conditions for placing?