Commune with Ashes

Scry X, where X is the number of land cards you
own in exile. Then, exile the top X cards of your
library. Until the end of your next turn, you may
play nonland cards from among those cards.
Forecast — Exile a land card from your hand,
Reveal Commune with Ashes from your hand:
Scry 2. If you exiled a Mountain to activate this ability, scry 4 instead. (Activate this ability only
during your upkeep and only once each turn.)