Prism Stars

Prism Stars (プリズミックスターズ) is a light-element spell, most recognized as one of several extensions to the Mystic Arte Dual the Sun, which appears in Tales of Eternia and Tales of Rebirth. This spell, like other extensions, can be used (and spammed rather effectively) by the Greater Craymel of Time, Sekundes, after his remaining HP reaches a certain level.

Prism Stars also appears as a Unison Attack in Tales of Symphonia. Prism Stars can only be used by Raine and Genis Sage have Ray and Explosion/Cyclone/Ground Dasher/Tidal Wave/Indignation programed into their unison command. After performing a unison attack Genis and Raine will shine and then Genis will shout out "Go! Prism Stars" sending a barrage of stars to attack the enemy. The special is a light elemental ability that attacks aroun 15-20 times taking out 100-350 in each hit.

Trivia
In the second game Dawn of the New World Raine and Genis use this attack on Tenebrae during a skit after he makes a bad pun about the party, although it's name was translated as Prismic Stars instead.