Thunderstorm is a third eraNaturedirect damagespell. The spell creates four waves of damage that spreads across creatures in range, doing less damage per jump to a new target. Its damage potential increases with upgrades, having five, six, and eight waves of lightning for upgrades I, II, and III.
It takes quite a few seconds for the multiple waves of damage to incur their full wrath. When being the target of a Thunderstorm, it is easy enough to reduce the damage potential by moving creatures out of the spell's radius. To ensure that creatures remain in range, crowd control such as Ensnaring Roots or Coldsnap should be utilized. There are still other escape mechanisms, of course, like Drones can burrow away, or Retreating Circle could be employed. For the attacker, this still has the fortunate effect of moving these creatures out of the fight, if only temporarily.
Creates a thunderstorm that tosses 4 bolts of lightning at enemy units within a 20m radius. Every bolt may jump to several targets dealing 180 damage to the first one while the following targets will receive continuously less damage. Lasts for 20 seconds. Reusable every 20 seconds.