Hidden Spell Tower

The animals keep begging for more spells, so why not given them what they want... but with a twist!

I introduce to you the concept of the:

http://i57.tinypic.com/wlrnzq.png

Okay so this is just a level 7 Hidden Tesla but it's merely for demonstration purposes only.

Here's how this bad boy works...

• Each village can hold 1 hidden spell tower
• Toggle between heal and rage
• Surrounding area affects all defensive units including CC troops
• Keep loaded using elixir
• Empty/inactive towers are visible to enemy
• Upgrade to increase spell effect.

Now this seems to add a lot of defensive strength so what can be done on balancing?

• Spell towers have low health
• Towers have a cooldown period during each raid. (So the effect, if triggered, will only last the same duration as an offensive troop.
• Activation range and spell ranges can be determined.

This is just a thought. A mere suggestion for future thought.