M:tG card similarity search
1B · Sorcery
Until end of turn, creatures you control gain menace and "Whenever this creature deals combat damage to a player, exile the top card of that player's library face down. You may look at and play that card for as long as it remains exiled, and you may spend mana as though it were mana of any color to cast that spell."
| Name | Mana | Type | Text |
|---|---|---|---|
| Balefire Dragon | 5RR | Creature — Dragon | Flying Whenever Balefire Dragon deals combat damage to a player, it deals that much damage to each creature that player controls. 6/6 |
| Gravestorm | BBB | Enchantment | At the beginning of your upkeep, target opponent may exile a card from their graveyard. If that player doesn't, you may draw a card. |
| Geistflame Reservoir | 2R | Artifact | Whenever you cast an instant or sorcery spell, put a charge counter on Geistflame Reservoir. {1}{R}, {T}, Remove any number of charge counters from Geistflame Reservoir: It deals that much damage to any target. {1}{R}, {T}: Exile the top card of your library. You may play that card this turn. |
| Helionaut | 2W | Creature — Human Soldier | Flying {1}, {T}: Add one mana of any color. 1/2 |
| R&D's Secret Lair | Legendary Land | Play cards as written. Ignore all errata. {T}: Add {C}. (This mana is still added to your mana pool.) | |
| Oona's Blackguard | 1B | Creature — Faerie Rogue | Flying Each other Rogue creature you control enters the battlefield with an additional +1/+1 counter on it. Whenever a creature you control with a +1/+1 counter on it deals combat damage to a player, that player discards a card. 1/1 |
| Govern the Guildless | 5U | Sorcery | Gain control of target monocolored creature. Forecast — {1}{U}, Reveal Govern the Guildless from your hand: Target creature becomes the color or colors of your choice until end of turn. (Activate only during your upkeep and only once each turn.) |
| Sylvok Explorer | 1G | Creature — Human Druid | {T}: Add one mana of any color that a land an opponent controls could produce. 1/1 |
| Covert Technician | 2U | Artifact Creature — Human Ninja | Ninjutsu {1}{U} ({1}{U}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.) Whenever Covert Technician deals combat damage to a player, you may put an artifact card with mana value less than or equal to that damage from your hand onto the battlefield. 2/4 |
| Once and Future | 3G | Instant | Return target card from your graveyard to your hand. Put up to one other target card from your graveyard on top of your library. Exile Once and Future. Adamant — If at least three green mana was spent to cast this spell, instead return those cards to your hand and exile Once and Future. |