In Assassin's Creed: Odyssey, where the admiration card is found in Assassin's Creed: Odyssey, you can refer to the following:
Southeast of the map
Pevka is an island located in the southeast of the map. There is Messala and the Arena on this island, and players need to sail there. The arena is located in the east of the island. There is a member of the cult. Players can kill him by continuously challenging the arena.