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“Uh, I'm confused. Don't these tablets usually give our monsters more power? Oh, maybe I'm not doing it right. There's something wrong with this thing! It's destroying all my monsters!”
Jestro in "Knight at the Museum"

Collapsing Crumble is a Forbidden Power that is able to totally destroy Stone Monsters as well as general rock and minerals.


Prior to the series

Collapsing Crumble was one of many Forbidden Powers created by Monstrox in his thirst for power to reign over Knighton. He kept it on a chain. After a battle, Merlok obtained the Forbidden Powers. He placed it with a Rogul but it was taken to the Knighton Official Museum of Art.

Knight at the Museum


  • Stone destruction: The user is able to totally destroy stone and make large buildings crumble into dust.
    • Stone Monster destruction: The user is able to disintegrate Stone Monsters easily.

In-game information

Type Power Attack Defense Heal
Air Stun 4 2 0

Any structure or statue made of stone will hit rock bottom with this one![1]


Nexo Knights

Season 3: Storm Over Knighton

Season 4: The End