New building: Spell Warehouse!

If you are in a clan and currently in war and you are farming, and a co asks you to train troops to attack, what do you do to the lightning/healing spells you have that you take with your barch? Just go to goblin maps and waste that elixir? Not anymore! With the spell warehouse, you can store spells for later!

Level 1: Unlocked at TownHall6
Storage: 2 spells
Level 2: Unlocked at TownHall8
Storage: 3 spells
Level 3: Unlocked at TownHall 10
Storage : 4 spells
I did not make a lv4 with 5 capacity cause that would be too overpowered for high level players.

Tell me me what you think!

I kind of like this idea. It would be nice not to throw away elixir because of wrong spells

I like the idea. I also agree that another building just to hold spells would be a waste. Maybe something like an army camp which would allow a player to store a certain amount of space for troops and/or spells but for only a restricted amount of time. After 5-6 hours the troops or spells would be expired?