Shadow Over Dumaran

Target opponent that controls 10 or more
permanents sacrifices permanents they control
until they only control 10 permanents
While Shadow Over Dumaran is in your
graveyard creatures in your hand with a mana
cost of 7 or higher gain Foretell. Their foretell
cost is equal to their mana cost. Whenever you foretell a creature with a mana cost of 7 or higher
you may cast Shadow Over Dumaran from your graveyard without paying its mana cost