THE CAVERNS
Take out the Bow of Apollo and shoot the red rubble with fire arrows to burn it down. The cube will move.
Once the cube stops, go to the far end corner and use the Helios’ Head to reveal a treasure chest that contains Minotaur’s Horn.
Hop to the other Cube and get ready to fight more sentries. Burn down the rubble from the switch and be ready to move.
Two Minotaurs will appear and attempts to break the chain that holds the Cube. Take them out first. More Sentries and a Chimera will appear as the cube is moving. Take the opportunity to ride the Chimera and take out as much Minotaur as you can because four will respawn after taking out the other two. The Minotaurs are fast and you would need to use Blade of Exile’s Army of Sparta in case you get surrounded.
Meet the Messenger God, Hermes. He will try to annoy Kratos and fly off to the chain all the way up. Follow him but don’t forget to replenish your health with the Green chest after a long fight.