M:tG card similarity search
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.
| Name | Mana | Type | Text |
|---|---|---|---|
| Festival | W | Instant | Cast this spell only during an opponent's upkeep. Creatures can't attack this turn. |
| Swindler's Scheme | 2U | Enchantment | Whenever an opponent casts a spell from their hand, you may reveal the top card of your library. If it shares a card type with that spell, counter that spell and that opponent may cast the revealed card without paying its mana cost. |
| Sphere of Resistance | 2 | Artifact | Spells cost {1} more to cast. |
| Roiling Vortex | 1R | Enchantment | At the beginning of each player's upkeep, Roiling Vortex deals 1 damage to them. Whenever a player casts a spell, if no mana was spent to cast that spell, Roiling Vortex deals 5 damage to that player. {R}: Your opponents can't gain life this turn. |
| Familiar's Ruse | UU | Instant | As an additional cost to cast this spell, return a creature you control to its owner's hand. Counter target spell. |
| Unifying Theory | 1U | Enchantment | Whenever a player casts a spell, that player may pay {2}. If the player does, they draw a card. |
| Vernal Equinox | 3G | Enchantment | Any player may cast creature and enchantment spells as though they had flash. |
| Fierce Guardianship | 2U | Instant | If you control a commander, you may cast this spell without paying its mana cost. Counter target noncreature spell. |
| Aven Interrupter | 1WW | Creature — Bird Rogue | Flash Flying When Aven Interrupter enters the battlefield, exile target spell. It becomes plotted. (Its owner may cast it as a sorcery on a later turn without paying its mana cost.) Spells your opponents cast from graveyards or from exile cost {2} more to cast. 2/2 |
| Firespout | 2R/G | Sorcery | Firespout deals 3 damage to each creature without flying if {R} was spent to cast this spell and 3 damage to each creature with flying if {G} was spent to cast this spell. (Do both if {R}{G} was spent.) |