I'm wondering this as well and it never got answered. I noticed that equipping the armor does in fact give +30% defense and attack to my units, (with the exception of the green dragons, weird) which can be seen even outside of battle on the information screen. I don't notice anything from the drill.
But this doesn't answer the question. What is the special influence? It can't be the defense/attack bonus, since none of my troops are dwarves, and it gives that bonus regardless. Anyone know for either item?
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