Effect
Reverberation
Reverberation weakens Strength, Dexterity, and Constitution saves and can trigger extra damage and Prone at its threshold.
Apply it before an effect requiring one of those saves. It does not also weaken Intelligence, Wisdom, or Charisma saves.
At 5 or more turns, the Thunder damage and the check for Prone are separate. Dealing the damage does not guarantee the target falls.
Saving Throws
Immune