Trinisphere [Kaladesh Inventions]Set: Kaladesh Inventions Type: Artifact Rarity: Mythic Cost: {3} As long as Trinisphere 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.) "This exhibition of Nehra's Threshold Principle must be expropriated and examined for its potential

each player discards their hand and returns to their hand each card they exiled this way

Set: Planar Chaos Type: Sorcery Rarity: Rare Cost: {2}{B}{B} Destroy all creatures

{4}: Put a +1/+1 counter on Walking Ballista

even a mountain would break

Set: Sun & Moon: Cosmic Eclipse Type: Water Rarity: Secret Rare Retreat cost: 0

equip that target to this card

Set: Base Set Shadowless Unlimited Type: Fire Rarity: Uncommon Retreat cost: Colorless

they must discard all copies of it in their hand

1 face-up monster your opponent controls loses 1000 ATK

Set: Box Topper Type: Metal Rarity: Promo Retreat cost: Colorless

Set: HeartGold & SoulSilver: Call of Legends Type: Water Rarity: Ultra Rare Retreat cost: Colorless

Set: Duelist Revolution Card type: Counter Trap Rarity: Ultimate Rare Attack: 0 Defense: 0 Pay 2000 Life Points to negate the Summon of a monster OR the activation of a Spell Card