I couldn't miss the chance to practice my drawing!
Umbral Vise is an ability used by Bahamut, which costs 1 ATB to use and inflicts major physical non-elemental damage to one target.
Umbral Vise is an enemy ability used by Bahamut's Final Fantasy XIII incarnation, which inflicts massive non-elemental damage to one target.
Umbral is derived from the Latin umbra, meaning "shadow".
A vise is a mechanical apparatus used to secure an object to allow work to be performed on it. Vises have two parallel jaws, one fixed and the other movable, threaded in and out by a screw and lever.