Nightmarishly Hard level

Nightmarishly Hard levels, also called owl levels , are levels officially marked to be a very difficult level by King. They are a proper subset of hexagon levels. It is usually the most difficult level in a given world, as each world is limited to one to six nightmarishly hard levels.

This feature is only explicitly shown on mobile. The level type color is hidden and changed to darker blue, which is ringed by a gold skull and a thundercloud above it and Odus is marking. No Dreamworld levels are nightmarishly hard levels since Dreamworld had been removed by the time nightmarishly hard levels were introduced.

In a mobile update in 2018, nightmarishly hard levels are implemented. They mark levels as "owl levels."

The first nightmarishly hard level is Level 62 in the fifth episode.

However, just like any other hard level, not all nightmarishly hard levels are usually the hardest. Examples are 501 (the hardest is 515).

See the full list of Nightmarishly hard levels.