Thundercloud

 

Thundercloud

Acquired

THM (traits)

Level

28

“

Grants a 10% chance that after each damage over time tick inflicted by Thunder or Thunder III (3% for Thunder II or Thunder IV), the next Thunder, Thunder II, Thunder III, or Thunder IV will add its full damage over time amount to its initial damage, have no cast time, and cost no MP.
Duration: 12s

— In-game description

Thundercloud is a trait unlocked at level 28. It is available for Thaumaturge / Black Mage.