"Got it!" He darts towards the side to get around to the back, just to make sure he's not in range of that tongue. He's been licked by enough monsters to want to avoid more. There's a slash of purple-pink energy that misses Tidus by a mile but impacts on the creature's side.

While Tidus has it distracted though he glows for a moment, starting to build up power. "Now!" He thrusts his staff forward and lets a huge fireball drop onto the creature. He can't do a lot more of those, but a good Fire IV takes care of a lot, in his experience.