Erfworld 66: page 60

[Dwagon]

True, we don't know if they can "cover" themselves or have units play shield.

But we know for a fact that they can target the unit of their choice. So Ansom should be able to target the warlords with his arkenpliers.

If dwagon can step in and take the blow, then good for them, but I don't think it works like that since Ansom specifically implied that the 3 warlorsd he thought were in the center hex with those 18 or more wounded Dwagons were uncroaked and that that was a good thing for them.