M:tG card similarity search
2U · World Enchantment
Whenever a player casts an instant spell, counter it unless that player pays {X}, where X is its mana value.
| Name | Mana | Type | Text | 
|---|---|---|---|
| Punishment | XBG | Sorcery | Destroy each artifact, creature, and enchantment with mana value X. | 
| Revolutionary Rebuff | 1U | Instant | Counter target nonartifact spell unless its controller pays {2}. | 
| Admiral's Order | 1UU | Instant | Raid — If you attacked this turn, you may pay {U} rather than pay this spell's mana cost. Counter target spell. | 
| Rashmi and Ragavan | 1GUR | Legendary Creature — Elf Monkey | Whenever you cast your first spell during each of your turns, exile the top card of target opponent's library and create a Treasure token. Then you may cast the exiled card without paying its mana cost if it's a spell with mana value less than the number of artifacts you control. If you don't cast it this way, you may cast it this turn. 2/4 | 
| Yahenni's Expertise | 2BB | Sorcery | All creatures get -3/-3 until end of turn. You may cast a spell with mana value 3 or less from your hand without paying its mana cost. | 
| Droning Bureaucrats | 3W | Creature — Human Advisor | {X}, {T}: Each creature with mana value X can't attack or block this turn. 1/4 | 
| Runecarved Obelisk | 4 | Artifact | {T}: Add {C}{C}. Put two charge counters on Runecarved Obelisk. {T}, Sacrifice Runecarved Obelisk: Seek a card with the highest mana value among cards in your library with mana value X or less, where X is the number of charge counters on Runecarved Obelisk. | 
| Ledger Shredder | 1U | Creature — Bird Advisor | Flying Whenever a player casts their second spell each turn, Ledger Shredder connives. (Draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on this creature.) 1/3 | 
| Invoke Calamity | 1RRRR | Instant | You may cast up to two instant and/or sorcery spells with total mana value 6 or less from your graveyard and/or hand without paying their mana costs. If those spells would be put into your graveyard, exile them instead. Exile Invoke Calamity. | 
| Memory of Toshiro | Enchantment Creature — Human Samurai | {T}, Pay 1 life: Add {B}. Spend this mana only to cast an instant or sorcery spell. 2/3 |