New spell: Miscellaneous spell

Hello everyone! I was just studying some lower class bases, when I came up with a new spell! It's really confusing, so just stick with me till the end. Its stats are:

Radius: 4-8
Pulses: 30-60
Pulses per second: 0.3s
Creation time: 30 minutes
Spell lever factory required: 2
Cost: 16,000 elixer

The spell itself would be a black liquid. Now, the spell, when thrown could be any spell from lightning to rage each with a 25% chance of happening. There's also the following possibilities: A combo of healing and rage (10%) A 6 radius explosion, damaging 50 damage to troops and 300 damage to the enemy (5%) A huge 8 radius health spell (This is the only time 8 radius spells appear)(5%) Nothing! (2.5%) Double damage lightning spell! (2.5%). Now you have to keep in mind, 2.5 percent is VERYsmall, out of 1,000 throws, it would only happen 25 times. To upgrade, it'd take 300,000 elixer and take 1 day, and you'd need a level 2 laboratory. When upgraded, the potion would cost 18,000 elixer and the chances nothing would go down 1%, with the double damage lightning spell going up 1%. It can not be upgraded from there. Other info: this spell would become less useful as time went on, but adjustment could eventually be made. Keep in mind this is for lower level players, like town hall 5 (unless you're willing to take a risk at a higher level). So, what do you think?

I like the idea! Unique and original!