During your time playingLies Of P, you’ll encounter numerous challenging boss fights that may prove to be quite demanding. However, it’s worth the effort to defeat these bosses because they generously reward you with Ergo, or even unique Ergo.
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These Rare Ergo items serve the same purpose as regular Ergo Fragments: upon consuming them, you’ll receive a specific number of Ergos. But don’t use them just yet, because the description says a treasure hunter can use them well. This treasure hunter’s name is Alidoro, and you definitely want to find him because he can do something great with bosses' Ergo.
How To Find Alidoro
In order to findAlidoroin the game, you’ll need to reach theSt. Frangelico Cathedral Library.
From the Stargazer, move forward and take the entranceleading to the left path. Move close to the walls asthere is an arrow trap in the middle of the way.

Continue along the main path to the rightuntil you reach a set of stairs leading upward.
Watch out for holes in the groundto avoid falling to the lower section.

Once you’ve ascended the stairs, move forward and then cross the bridge. Look foran entrance on the right side that takes you downward.
In this area, you’ll encounterDecayed Waterthat you should quicklytraverse to the left until you find another entrance leading upward.
At the top, you’ll face a strong enemy, so be prepared for a tough battle.
Inside this room, you’ll spotan elevator right in front of you.
From here, you can also grab theArchbishop’s Holy Mark.
Use the elevator to reach a balcony area where you’ll find an NPC in front of you;that’s Alidoro.
Alidoro can help you trade special weapons using Rare Ergothat you’ve obtained from defeating bosses.
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