New Spell: Enlightenment

Are you frustrated with your troops dying so quickly? Even with a healing spell, they still get shot down. Well, look no further, as the Enlightenment spell will support your cause! This amazing spell will cause all troops to go into zen mode and turn the tide of battle!

The Enlightenment spell grants a brief moment of invincibility to allied troops inside of it. Make sure to hit the most amount of troops possible!

This spell would have 5 different levels.

Invincibility Time:2/2.25/2.5/2.75/3 seconds
Cost:25000/28000/32000/35000/40000 Elixir
Creation Time:1.5 hours
Level 6 Spell Factory needed
Upgrade Cost:3000000/4000000/7000000/8000000 Elixir
Upgrade Time:7/9/12/14 Days

TRIVIA
The Enlightenment spell will not prevent troops from being sprung off the world by the spring trap.
The Enlightenment spell has the shortest duration of any aura spell.

What do you think? Tell me if it needs any changes! Anything is appreciated!