Card Codex

M:tG card similarity search

17 May 2024: Card library updated.

Common Courtesy

2UU · Enchantment

Whenever a player casts a spell without asking your permission while casting it, counter that spell. When a player asks you permission to cast a spell and you refuse, counter that spell and sacrifice Common Courtesy.

Similar cards

Color identity:
NameManaTypeText
Arenson's Aura 2WEnchantment {W}, Sacrifice an enchantment: Destroy target enchantment. {3}{U}{U}: Counter target enchantment spell.
Teferi's Care 2WEnchantment {W}, Sacrifice an enchantment: Destroy target enchantment. {3}{U}{U}: Counter target enchantment spell.
Secret Base Land {T}: Add {C}. {T}: Add one mana of any color. Spend this mana only to cast a spell that shares a watermark with Secret Base.
Silverquill Pledgemage 1W/BW/BCreature — Vampire Cleric Magecraft — Whenever you cast or copy an instant or sorcery spell, Silverquill Pledgemage gains your choice of flying or lifelink until end of turn. 3/1
Spellrune Howler Creature — Werewolf Whenever you cast an instant or sorcery spell, Spellrune Howler gets +2/+2 until end of turn. Nightbound (If a player casts at least two spells during their own turn, it becomes day next turn.) 3/4
Diluvian Primordial 5UUCreature — Avatar Flying When Diluvian Primordial enters the battlefield, for each opponent, you may cast up to one target instant or sorcery card from that player's graveyard without paying its mana cost. If a spell cast this way would be put into a graveyard, exile it instead. 5/5
Silumgar Spell-Eater 2UCreature — Naga Wizard Megamorph {4}{U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its megamorph cost and put a +1/+1 counter on it.) When Silumgar Spell-Eater is turned face up, counter target spell unless its controller pays {3}. 2/3
Leyline of Lifeforce 2GGEnchantment If Leyline of Lifeforce is in your opening hand, you may begin the game with it on the battlefield. Creature spells can't be countered.
Suffocation 1UInstant Cast this spell only if you were dealt damage this turn by a red instant or sorcery spell. Suffocation deals 4 damage to the controller of the last red instant or sorcery spell that dealt damage to you this turn. Draw a card at the beginning of the next turn's upkeep.
Delayed Blast Fireball 1RRInstant Delayed Blast Fireball deals 2 damage to each opponent and each creature they control. If this spell was cast from exile, it deals 5 damage to each opponent and each creature they control instead. Foretell {4}{R}{R} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)
Page 222