Wraiths

"We took the mission because of the information he passed before he died." 

The Lion Head, Simba, spoke. 

Nux narrowed his eyes, waiting for the man to continue. 

"The Death Energy that had surrounded Umbrasol and is now leaking out, we call it the Reaper's Veil. The Reaper's Veil has become a threat to the surrounding worlds. 

For now, the Supreme Worlds have used their powers to teleport Umbrasol extremely far away, so it is not very dangerous for now, however, it is definitely not a threat we can ignore. 

If not today, then in a few million or a billion years, when the Death Energy from the Reaper's Veil grows strong enough to reach here without being completely destroyed by the Universal Energy in space, we won't be able to handle it. 

This is also the reason why this mission isn't closed or taken down despite so many failed attempts."