It can't be combined with other alternative costs, such as casting a spell "without paying its mana cost." To determine the total cost of a spell, start with the mana cost or alternative cost (such as a bestow cost) you're paying, add any cost increases, then apply any cost reductions
House, President and CEO
Wizards of the Coast has confirmed that full previews wont happen until after the holidays, but several cryptic teases have given us a clearer picture of what to expect
Were playing like control decks with Black in them
That means its subject to cost-reducers, like Defiler of Faith and Heralds Horn
For example, in Strixhaven: School of Mages, the basic land slot was instead replaced by the Mystical Archive card, which could be uncommon, rare, or mythic