Whenever a player casts a spell, if no colored mana was spent to cast it, counter that spell.
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Brushland
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{T}: Add {C}. {T}: Add {G} or {W}. Brushland deals 1 damage to you.
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Anointed Peacekeeper
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Vigilance As Anointed Peacekeeper enters the battlefield, look at an opponent's hand, then choose any card name. Spells your opponents cast with th...
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Pithing Needle
Innistrad: Midnight Hunt
As Pithing Needle enters the battlefield, choose a card name. Activated abilities of sources with the chosen name can't be activated unless they're...
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Nadir Kraken
Theros Beyond Death
Whenever you draw a card, you may pay {1}. If you do, put a +1/+1 counter on Nadir Kraken and create a 1/1 blue Tentacle creature token.
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Mystical Dispute
Throne of Eldraine
This spell costs {2} less to cast if it targets a blue spell. Counter target spell unless its controller pays {3}.