Why didn't they just drill out?

Asriel ripped up Sariel from Touhou 1

Magic, aint gotta explain shit

>>380628969
It's not the dirt and rock keeping them trapped. It's a magic barrier that they'd probably smack into no matter what angle they dug at as long as it was close to the surface.

>>380630927
Just go under and up on the other side. They're deep enough to have access to lava and I doubt the barrier goes all the way down.

>>380631321
>barriers can't be spherical