In the Eye of Chaos [Legends]Set: Legends Type: World Enchantment Rarity: Rare Cost: {2}{U} Whenever a player casts an instant spell, counter it unless that player pays {X}, where X is its mana value.

rounded down

prevent 1 arcane damage that source would deal

Set: Sword & Shield: Evolving Skies Type: Dragon Rarity: Ultra Rare Retreat cost: 0

Sacrifice Arid Mesa: Search your library for a Mountain or Plains card

Set: EX: Team Magma vs Team Aqua Type: Water Rarity: Ultra Rare Retreat cost: Colorless

Set: Platinum: Rising Rivals Type: Lightning Rarity: Secret Rare Retreat cost: Colorless

put a flow counter on Channel Lake Frigid then destroy it unless you put an Ice card from your pitch zone on the bottom of your deck for each flow counter on it

and that player can't activate abilities that aren't mana abilities

Set: Sun & Moon: Unbroken Bonds Type: Psychic Rarity: Secret Rare Retreat cost: Colorless

he is a master of trickery and misdirection

sacrifice Phantasmal Forces unless you pay {U}

Set: Jungle Unlimited Type: Colorless Rarity: Holo Rare Retreat cost: Colorless