The final boss uses Telluric Fury as one of his powerful melee attacks: he performs an upward, downward and then wide swing with his katana, all having purple energy on them.
Heaven's Cataract is a Blue Bullet spell, learned from the Chac, Gucumatz, and Kukulcan enemies. It deals non-elemental magic damage to all enemies, and reduces their Defense and Magic Defense by two levels for the MP cost of 22.
Hissatsu: Shinten is a Samurai ability unlocked at Level 62, dealing damage with a potency of 300 and requires 20 points of the Kenki gauge to use.
Telluric Fury is one of Sephiroth's Bravery attacks, attacking with a four hit slashing combo with his sword while advancing forward. Pressing with the right timing allows him to cancel the finishing animation into a dash.
Heaven is a common religious, cosmological, or transcendent place where heavenly beings such as gods, angels, jinn, saints, or venerated ancestors are said to originate, be enthroned, or to live. According to the beliefs of some religions, heavenly beings can descend to earth or incarnate, and earthly beings can ascend to Heaven in the afterlife, or in exceptional cases enter Heaven alive.
震天 "Shinten" is a Chinese verb that literary translates to "(something so forceful that it) shakes the heavens".