Eye of Skadi - Orb Effect?

As we all know, the items Sange, Sange&Yasha, Mask of Death, Helm of Dominator, Mask of Madness, etc., any item that has an orb effect do not stack when you have two of them in your hero's item inventory right? According to the item description of Eye of Skadi, it is an orb effect. But have anyone notice, once you have it in your hero's item inventory, the orb effect text disappear. Does this mean anything? In my experience, I bought another orb effect item. I choose to have Sange&Yasha because of the chance to maim enemy. As a result, every time my hero attacks an enemy, the enemy status shows that he is being slowed by freeze effect and at by chance, the enemy is maimed. This does mean that Eye of Skadi and Sange&Yasha that are both orb effects is stacking? For me, this is a powerful combination of items especially for those ranged hero that has high attack speed. Having both of this items will surely become "beyond Godlike".