Breakdown of ¡Ojalá el magma no hubiera salido por la grieta!
no
no / not
salir
to go out, to leave / to appear, to come out (on the body)
por
for / by / through / in (during a part of the day)
haber
to have (auxiliary)
Elon.io is an online learning platform
We have an entire course teaching Spanish (Spain) grammar and vocabulary.