How exactly do they interfere? Does it cost more mana to cast the spell, does it become weaker, or does it affect your own units? Please tell me, because I don't know.
P.S. I really don't know, so my message doesn't mean that you're wrong.
Well, I don't play as the Stronghold very often, but I have observed two effects.
1. The spell power of the Chaos spell was reduced by half when cast.
2. The spell didn't work at all.
