My first issue is the cost in mats, 8 iron an 8 yggdrasil wood makes this this item then most expensive wall in the game if I'm not mistake. In fact, it would cost less iron to just cover the same amount of surface area with an Iron wall.

My second issue is functionality. Dviger Stake Walls rot when partially submerged in water, and the yggdrasil wood does not drop if structure is destroyed after period of time has elapsed (only tested in the meadows). Conceptually this makes sense, wood and iron be like that, but for the cost, and the intention of the structure ( a defensive object) to further limit its utility like that makes it a practically useless. It should also be noted that a normal stake wall, and the Dvegr sharp stakes do not rot when partially submerged, so this feature lacks internal consistency among similar structures with similar constituent components.

My Suggestion, reduce the cost of the recipe for the structure by 50%, fix the bug that prevents the yggdrasil wood from dropping, and tweak the attributes so the Dviger Stake Wall does not rot when submerged.