Fury from beneath

Deal 3 damage to each creature, plainswalker and player.
Return up to two target lands you controll, for each land returned this way. Destroy that many target lands.
Submerge - {1}{u/r}{u/r}{u/r} (Whenever a land enters the battlefield untapped you may tap it and cast exile this card from your graveyard. Untill the end of turn you may cast this card.)