Quick gameplay video I recorded showing the first appearance of the Menacing Ruin monster.
On this scene, Alice acquires an umbrella that serves as a defensive tool to deflect enemy attacks. When timed correctly, the umbrella can also reflect the enemy attacks back to the source. This becomes useful with the appearance of the Menacing Ruin as the monster can block all incoming attacks while his defensive arms are up. When you time your block correctly, you can reflect the monster’s own fireballs to destroy his defensive arms. After this, he becomes vulnerable to your attacks using the Vorpal Blade and Pepper Grinder.
Later on in the game you can acquire a Hobby Horse that can directly damage the Menacing Ruin by smashing through his defenses.