Corrupted voidwaker

High alchemy turns Corrupted voidwaker into 150,000 gp. Buying one at 2,500,000 gp (its guide price, as it has not traded today) and casting with a nature rune at 138 gp costs 2,500,138 gp. That is a loss of 2,350,138 gp per cast at its guide price, so it is not worth alching for profit right now.