Fountainhead Palace Sekiro:
To access the Fountainhead Palace, defeat the Corrupted Monk and Guardian Ape, collect their items and return to Ashina Castle. Defeat the Great Shinobi Owl and go to the Wedding Cave Door idol in Ashina Depths. Go through that door and defeat the real Corrupted Monk to enter Fountainhead Palace.
Fountainhead Palace starts off in Mibu Manor. After defeating enemies and reaching idols, the player must defeat the Sakura Bull mini-boss. After the Bull is defeated, head on ahead to the Lake part of the Palace. Go from idol to idol while avoiding being eaten by the Great Colored Carp. There is a Shimochi Warrior mini-boss to defeat as well. At the final Sanctuary Idol, pray there to begin the Divine Dragon boss battle. Defeat him to receive the Divine Dragon's Tears and head back to Kuro.
After defeating several mini-bosses in the Ashina Outskirts, the player will face the final boss fight of the game. Defeat Genichiro and his grandfather Isshin Ashina to conclude Fountainhead Palace and the game.
Once players reach the endgame of this very long game, there are slow but sure ways of cheesing or beating even the toughest of bosses.
Photo courtesy of FromSoftware and Activision