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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
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Trinisphere (2XM—303 foil) is an Artifact reprinted in Double Masters that enforces a minimum of three mana to cast spells while it’s untapped. Its static ability raises any spell whose mana component would be less than three to cost three mana total, interacting after other cost changes are applied. Players commonly include it to slow down fast, low-cost strategies and to skew resource parity in midrange or prison-style decks.
Catalog pricing data as of 5 May 2026, 00:29
