Check your map for a small icon to the west that shows the location of a cat statue (there's a second one very close to the Mermaid spring you came through). Run to the statue and use your new Catwalk brush technique to climb to the top of the cliff. Once there, move forward and you will be attacked by a new enemy type, the Blue Cyclops. To fight the cyclops, simply jump at him and unload with Rosary attacks. Power Slashes will get blocked by the mask he wears, and using other brushstrokes seems to provoke the enemy into more aggressive tactics. Watch out if the Blue Cyclops takes off his mask as he enters a Chaos Mode. Just avoid him entirely and wait for the mask to go back on before attacking.