Kuro - Vol. 3 Ch. 118.119

[MangaDex]

 

[DANDAN_THE_DANDAN]

Could it be that Kuro needs both energy and blackness to survive?

Here's a trivia: black surfaces absorbs light at the infrared spectrum the most efficiently and thus heats up easily under the sunlight. It is also the most efficient at radiating heat away though.

 

[SonicDisgaea98]

So he can teleport now.