Kill a boss while riding Torrent the entire fight

To mark this square you must defeat a boss while mounted on Torrent for the whole fight. If you dismount before the boss is dead, or if you get dismounted due to the bosses attacks, you need to restart the fight from the beginning.

Field bosses like Agheel and Tree Sentinel are options, but you can also do Ruins bosses like Pumpkin Head, as the game allows Torrent to be mounted within their underground arenas.

It is allowed to kill Commander O'Neil by using the rot geysers around his arena for completing this square. Summons and consumables are also allowed.