Belleriand's Annihilation

Destroy all permanents, then each player searches
their library for up to seven basic land cards, put
them onto the battlefield tapped, then shuffles
their library.
"For so great was the fury of those adversaries that
the northern regions of the western world were rent asunder, and the sea roared in through many chasms,
and there was confusion and great noise"
—The Silmarillion