Ornitholestes

Ornitholestes is a special enemy in Final Fantasy X which is created in the Monster Arena when five of each Reptile-species fiends have been captured.

With high Agility and Evasion stats, this monster can be difficult to hit. Stacking the special abilities Aim and Luck, as well as using Jinx on Ornitholestes, will lower his chances to avoid physical attacks.

It's Poison Touch attack will inflict the poison status and also halve the HP of the victim. When it's HP gets low, Ornitholestes will use Drain Touch, which can syphon a large amount of HP from a character.