Resistant or Hardened Skin can block magic damage, I think.
None of these would work because it's a channeling spell, and if I use those, I have to order the unit to use it, and then it won't channel anymore.
@Anti-Magic Shell
Erh, you don't have to? Use a dummy unit to cast Anti-Magic Shell =P..
Isn't it self-target?
Erh, isn't it? I think it isn't self-target..
I'm sure it isn't self target ..
Isn't there an item that does that like Anti-Magic Shell?