Hello Lord Primos , hmmm could be  convenient for the playr to  have back the spell sent and which find the shield activated...in my opinion you can submit this idea in the Suggestions section , maybe the devs will considerate it ...

https://plarium.com/forum/en/stormfall-age-of-war/451_suggestions/

i wish you a good game and stay safe !

Because it's the price you pay for pushing the Button without considering that a player might be active and pushing buttons to protecting their own interest. 

The intent you had was to destroy a castles troops with only the loss of a fireball and none of your troops. And the purpose of the Weors Protection is to protect the castle without a loss of troops. 

As the castle you attack can't put the Weors Protection back in his inventory if he doesn't want it up any more and must also be dropped if they want to raid any castles. Or send fireballs of their own 

These are Genies that you can't put back into the bottle !