Celedonio, the Battle-Tested (Japanese: 歴戦のセレドニオ Rekisen no Seredonio) is a Tyrant in Xenoblade Chronicles X. It is a member of the Grex family. It can be found at level 18 at Keegan Ridge in Oblivia. Defeating it is required to complete the eponymous basic mission Celedonio, the Battle-Tested.