Decreases the number of attacks before the combo finale, but unleashes Thundara as a finishing shot.
Thunder+ (サンダー改, Sandā Kai?, lit. Enhanced Thunder) is a lightning-elemental magic ability in Lightning Returns: Final Fantasy XIII exclusive to the Electronica garb. It has ATB cost of 15, Attack of 0.85, stagger power of C and stagger time of E. When using Thunder+ in succession, the first two spells that are cast are two Thunders under the name "Thunder+", but the third, final spell in the chain is Thundara.
Thunder is the sound caused by lightning. Depending on the distance and nature of the lightning, thunder can range from a sharp, loud crack to a long, low rumble (brontide).