Here’s what I like to call the legacy tomes - Micaiah’s Pyre, Katarina’s Bolt, and Celica’s Gale! Micaiah’s Pyre gives a boost to both Defense and Resistance, Katarina’s Bolt has a high critical hit rate, and Celica’s Gale allows the user to always hit at least twice. These tomes can be found in shining spots on the battlefield and can be bought from Micaiah, Katarina, and Celica’s SpotPass teams! Only a few more tomes left to go!
Others can be found here -