Beseech the Mountaintop

Behold the Divine —If only mana produced by
basic lands was spent to cast this spell, it enters
the battlefield as an enchantment after it resolves.
When you cast this spell, exile the top ten cards
of your library. Until the end of your next turn,
you may play cards exiled this way.
As long as Beseech the Mountaintop is an
enchantment, you may play face-up cards you
own in exile.