M:tG card similarity search
U · Legendary Artifact
The Enigma Jewel enters the battlefield tapped. {T}: Add {C}{C}. Spend this mana only to activate abilities. Craft with four or more nonlands with activated abilities {8}{U} ({8}{U}, Exile this artifact, Exile the four or more from among other permanents you control and/or cards in your graveyard: Return this card transformed under its owner's control. Craft only as a sorcery.)
| Name | Mana | Type | Text | 
|---|---|---|---|
| Oaken Siren | 1U | Artifact Creature — Siren Pirate | Flying, vigilance {T}: Add {U}. Spend this mana only to cast an artifact spell or activate an ability of an artifact source. 1/2 | 
| Primal Beyond | Land | As Primal Beyond enters the battlefield, you may reveal an Elemental card from your hand. If you don't, Primal Beyond enters the battlefield tapped. {T}: Add {C}. {T}: Add one mana of any color. Spend this mana only to cast an Elemental spell or activate an ability of an Elemental. | |
| Faith's Fetters | 3W | Enchantment — Aura | Enchant permanent When Faith's Fetters enters the battlefield, you gain 4 life. Enchanted permanent can't attack or block, and its activated abilities can't be activated unless they're mana abilities. | 
| Realmbreaker's Grasp | 1W | Enchantment — Aura | Enchant artifact or creature Enchanted permanent can't attack or block, and its activated abilities can't be activated unless they're mana abilities. | 
| Bound in Gold | 2W | Enchantment — Aura | Enchant permanent Enchanted permanent can't attack, block, or crew Vehicles, and its activated abilities can't be activated unless they're mana abilities. | 
| Intercessor's Arrest | 2W | Enchantment — Aura | Enchant permanent Enchanted permanent can't attack, block, or crew Vehicles. Its activated abilities can't be activated unless they're mana abilities. | 
| Crackdown Construct | 4 | Artifact Creature — Construct | Whenever you activate an ability of an artifact or creature that isn't a mana ability, Crackdown Construct gets +1/+1 until end of turn. 2/2 | 
| Azorius Guildmage | W/UW/U | Creature — Vedalken Wizard | {2}{W}: Tap target creature. {2}{U}: Counter target activated ability. (Mana abilities can't be targeted.) 2/2 | 
| Myr Reservoir | 3 | Artifact | {T}: Add {C}{C}. Spend this mana only to cast Myr spells or activate abilities of Myr. {3}, {T}: Return target Myr card from your graveyard to your hand. | 
| City of Solitude | 2G | Enchantment | Players can cast spells and activate abilities only during their own turns. |