New spell (activates all traps in the spell ring)

I thought of a spell that u can unlock at th 10 with a lvl 6 spell factory. When u drop the spell all the traps will be activated in the spell ring. The spell ring shouldn't be to large so it wouldnt be to over powered. I dont know how u would upgrade this spell but i think it would be a great addition to clash of clans.

When u upgrade the spell the spell ring increses by a few tiles.

Well it isn't overpowered it sounds good