The Iron Gate is a gate you can build (the Slate kit).
In-game description
A black iron gate between slate posts. E opens and shuts it.SHOWN IN THE BUILD RING
Building it
It costs 1 
Stone, 1 
Iron Ingot, 1 Earth 1 Wind spirits. It needs 2 Jewels first. Take it down with DISMANTLE to get its cost back (see Building).
