Lakyus didn't know how Wilkis was capable of harnessing the might of that ancient mecha. But he understood one fact.
"Forget about the armor, we will leave this place and seal the coordinates of our home plane."
"None shall ever leave this place."
This plane was collapsing and would soon turn into food for the void. As for its last two guests, this plane would become a tomb for them.
And Lakyus understood that for grade five beings, specifically the externalist, a void space is just their homeground. They are beings that cut a plane for their own use when they enter grade five.
A world of their own, something that Lakyus can only steal from others and never call it part of his own existence.
But it didn't mean that Wilkis would be unharmed by doing this. Closing the plane coordinated after shutting off the entrance would make it so that Wilkis would never be able to find his way back.