Engravings are earned in multiple ways. They’re normally obtained either with level ups, or by completing quests. However, the best ones being reserved for finding the locations described in the riddles contained within the Ainigmata Ostraka, found in certain key locations in Assassin’s Creed Odyssey. Having decent equipment is one thing, but with bit of time investment, you can effectively upgrade your equipment much further with little effort. This guide has all the solutions to the Ainigmata Ostraka, as well as details on how to equip engravings.
Source : rockpapershotgun.com