Card Codex

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17 May 2024: Card library updated.

Thassa's Rebuff

1U · Instant

Counter target spell unless its controller pays {X}, where X is your devotion to blue. (Each {U} in the mana costs of permanents you control counts toward your devotion to blue.)

Similar cards

Color identity:
NameManaTypeText
Prime Speaker Zegana 2GGUULegendary Creature — Merfolk Wizard Prime Speaker Zegana enters the battlefield with X +1/+1 counters on it, where X is the greatest power among other creatures you control. When Prime Speaker Zegana enters the battlefield, draw cards equal to its power. 1/1
Defiler of Faith 3WWCreature — Phyrexian Human Vigilance As an additional cost to cast white permanent spells, you may pay 2 life. Those spells cost {W} less to cast if you paid life this way. This effect reduces only the amount of white mana you pay. Whenever you cast a white permanent spell, create a 1/1 white Soldier creature token. 5/5
Thunder of Hooves 3RSorcery Thunder of Hooves deals X damage to each creature without flying and each player, where X is the number of Beasts on the battlefield.
Lavinia, Azorius Renegade WULegendary Creature — Human Soldier Each opponent can't cast noncreature spells with mana value greater than the number of lands that player controls. Whenever an opponent casts a spell, if no mana was spent to cast it, counter that spell. 2/2
Obsidian Fireheart 1RRRCreature — Elemental {1}{R}{R}: Put a blaze counter on target land without a blaze counter on it. For as long as that land has a blaze counter on it, it has "At the beginning of your upkeep, this land deals 1 damage to you." (The land continues to burn after Obsidian Fireheart has left the battlefield.) 4/4
Planequake XRSorcery Planequake deals X damage to each creature without flying and each planeswalker. If X is 10 or more, open the "Uncovered Cavern" plot booster.
Jamie McCrimmon 2GLegendary Creature — Human Warrior Trample Whenever you cast a historic spell, Jamie McCrimmon gets +X/+X until end of turn, where X is that spell's mana value. (Artifacts, legendaries, and Sagas are historic.) Doctor's companion (You can have two commanders if the other is the Doctor.) 2/2
Jadelight Spelunker XGCreature — Merfolk Scout When Jadelight Spelunker enters the battlefield, it explores X times. (To have it explore, reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on that creature, then put the card back or put it into your graveyard.) 1/1
Epic Experiment XURSorcery Exile the top X cards of your library. You may cast instant and sorcery spells with mana value X or less from among them without paying their mana costs. Then put all cards exiled this way that weren't cast into your graveyard.
Cosmic Horror 3BBBCreature — Horror First strike At the beginning of your upkeep, destroy Cosmic Horror unless you pay {3}{B}{B}{B}. If Cosmic Horror is destroyed this way, it deals 7 damage to you. 7/7
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