spell donation

You can request troops as clan castle.Why not spells?The clan castle now can be filled with the same troop capacity and a new additional spell capacity.When attacking you will have two clan castle units.One for the troops and one for the spells that can look like a bottle which you can cast anywhere.

It isn't a too bad Idea, but it would be OP, because if you have a TH10 in your clan you Have OP Spells, so, nice Idea but too OP