How does Thunderstorm or Super Thunderstorm work?

The thunderstorm spell was released recently as both an armory prize and as a forgeable spell in the Level 6 Forge, and has proven to be too strong/OP. We wanted to find a solution that brings its strength to an appropriate level, while also not punishing players that won the spell in the armory/events or forged the boosts. Therefore, we are making the following change:

• All existing thunderstorm spell boosts will become a Super Thunderstorm' spell boosts, with the same stats that they currently have. More Super Thunderstorm spell boosts will not be available.
• New thunderstorm spell boosts from the forge or as prizes will have their damage reduced to a more appropriate level.