Originally Posted by
Kenji1134
Every time one of your Thunder dots ticks on a mob, you have a 10% chance to have Thundercloud proc. It is a straight 1 in 10 rng based chance, no counters, no logic, just rng, and you get an independent roll on every mob every server tick.
Any easy way to see this in action is to go to Bentbranch Meadows (for instance) and apply Thunder to 3-4 target dummies, you will eventually see 2 Thundercloud procs appear at the same time, since they were triggered by 2 independent sources (dots on different targets).