M
15
Artifact
As long as Trinisphere is untapped, each spell that would cost less than three mana to cast costs three mana to cast.
Designed to restrain petty thoughts, but used to repress entire empires.
Passionate Archaeologist (Rainbow Foil) [Secret Lair Drop Series]
Tale of Katara and Toph [Avatar: The Last Airbender: Eternal-Legal]