A intermediate material chest is an item in Evony TKR (The King's Return).
The description of Intermediate Material Chest in Evony TKR says:
Open to receive one or two Equipment materials.
Intermediate Material Chest is known to potentially be obtainable from opening Lucky Box Ⅳ, Lucky Box Ⅴ and Lucky Box Ⅵ. The links for each item are below:
Note: This list may be incomplete.