Claymore is wanked so fucking hard the best feat verse has to offer is not even hill level as they did not even destroy the hill just damaged it
Priscilla is not hill level for destroying the hill sized sized destroyer she only attacked the top part not the part that makes up it's main body also the skin would not be as durable as an hill regardless of size
Isley and Luciala are not mountain busters their best feat is making explosions and then making bigger explosions which some destroyed some ground and trees
No Claymore characters are not some kind of massively hypersonic or even releavistic to light speed characters they have nothing to suggest even supersonic they can move faster than the eye can see or move faster than the eye can see to other characters who can also do that but nothing suggests their speed is even as fast as sound
They are faster than eye but subsonic so their speed is laughable even for Demon Slayer standards
The destroyer never ate an entire forest just part of it
No that did not destroy a mountain only a castle
In short the best feats in Claymore are destroying some ground (not a significant amount),some buildings,part of a forest ( not the entire forest), part of a hill (not the entire hill) with overrated speed which faster than eyesight but definitely still subsonic
Claymore is an overworked fodder verse up there with Akame Ga Kill and D Gray man