NulShock is a status in Final Fantasy X. NulShock nullifies one Lightning-elemental attack done to the target. After the effect wears off, the status must be reapplied to take effect again. The active status is represented by a circling yellow orb.
Final Fantasy X Scenario Ultimania - Final Fantasy X Battle Ultimania - Final Fantasy X Ultimania Omega (Final Fantasy X International Ultimania) - Final Fantasy X HD Remaster Ultimania - Final Fantasy X BradyGames Official Strategy Guide - Final Fantasy X Piggyback The Official Strategy Guide