As long as Trinisphere is untapped, each spell that would cost less than three mana to cast costs three mana to cast.

"This exhibition of Nehra's Threshold Principle must be expropriated and examined for its potential applications in enforcement."
—Confiscation directive

• Number: 52
• Rarity: S
• Type: Artifact
• Mana cost: 3
• Color: Colorless
• Artist: Daniel Ljunggren