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As long as this artifact is untapped, each spell that would cost less than three mana to cast costs three mana to cast. (Additional mana in the cost may be paid with any color of mana or colorless mana. For example, a spell that would cost {1}{B} to cast costs {2}{B} to cast instead.)
Abilities, attacks, weakness & resistance
Other cards from Darksteel
Mirrodin's Core
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Trinisphere (DST-154) is a rare artifact from the Darksteel expansion. While untapped, it sets a floor of three mana for casting spells whose mana portion would be less than three. The card is commonly used to tax opponents' low-cost spells and shape early turns in mana-restricted strategies.
Catalog pricing data as of 16 Apr 2026, 13:16
