Invincibility spell

Invincibility spell
100,000
Ground/air troops
Splash/healing
5 seconds
60 minutes
Wizards have finally found the recipe to invincibility for a few seconds.
Lvl 1 5 seconds 100,00 elixer
Lvl 2 8 seconds 150,000 elixer
Lvl 3 10 seconds 250,000 elixer
Lab lvl max for lvl 2 and 3

CATCH: It works on enemy troops too

Spell factory lvl 6

I think this could work because of the catch and I'm just saying I'm a little lost does it put them back at 100% health or does it just sustain them while they are in the circle