As long as Trinisphere is untapped, each spell that would cost less than three mana to play costs three mana to play. (Additional mana in the cost may be paid with any color of mana or colorless mana. For example, a spell that would cost to play costs to play instead.)
Editions
Formats
Legal in Modern, Legacy
Restricted in Vintage.
Rulings
For special rulings for this card visit the
Gatherer page
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