Name: Conversion Cost: 2WW Type: Enchantment Rules Text: At the beginning of your upkeep, sacrifice this enchantment unless you pay {W}{W}. All Mountains are Plains. Set/Rarity: Limited Edition Alpha uncommon, Limited Edition Beta uncommon, Unlimited Edition uncommon, Intl. Collectors' Edition uncommon, Collectors' Edition uncommon, Foreign Black Border uncommon, Revised Edition uncommon, Summer Magic / Edgar uncommon, Fourth Edition uncommon, Fourth Edition Foreign Black Border uncommon, Masters Edition IV rare, 30th Anniversary Edition uncommon Price: $0.22

Name: Conversion Apparatus Cost: 3 Type: Artifact Rules Text: {T}: Add {C}. {3}, {T}: You get {E}{E}{E} (three energy counters). {T}, Pay {E}{E}{E}: Add three mana in any combination of colors. Set/Rarity: Modern Horizons 3 Commander rare Price: $0.24

Name: Conversion Chamber Cost: 3 Type: Artifact Rules Text: {2}, {T}: Exile target artifact card from a graveyard. Put a charge counter on this artifact. {2}, {T}, Remove a charge counter from this artifact: Create a 3/3 colorless Phyrexian Golem artifact creature token. Set/Rarity: New Phyrexia uncommon Price: $0.20

Name: Conviction Cost: 1W Type: Enchantment -- Aura Rules Text: Enchant creature Enchanted creature gets +1/+3. {W}: Return this Aura to its owner's hand. Set/Rarity: Stronghold common, Tempest Remastered common, Aether Revolt common, Ultimate Masters common, The List common, Kaladesh Remastered common Price: $0.04

Name: Cooking Campsite Type: Land Rules Text: {T}: Add {W}. {3}, {T}, Sacrifice an artifact: Put a +1/+1 counter on each creature you control. Activate only as a sorcery. [Back face. Transforms from Sidequest: Catch a Fish.] Set/Rarity: Final Fantasy uncommon Price: $0.21

Name: Cool Fluffy Loxodon Type: Stickers Rules Text: {TK}{TK} -- When this permanent leaves the battlefield, draw a card. {TK}{TK}{TK}{TK}{TK} -- Whenever a creature enters under your control, this permanent becomes a 13/13 Eldrazi creature in addition to its other types until end of turn. {TK}{TK} -- 4/2 {TK}{TK}{TK}{TK} -- 5/6 Set/Rarity: Unfinity Sticker Sheets common Price: $0.20

Name: Cooped Up Cost: 1W Type: Enchantment -- Aura Rules Text: Enchant creature Enchanted creature can't attack or block. {2}{W}: Exile enchanted creature. Set/Rarity: Wilds of Eldraine common Price: $0.04

Name: Cooperation Cost: 2W Type: Enchantment -- Aura Rules Text: Enchant creature Enchanted creature has banding. (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding a player controls are blocking or being blocked by a creature, that player divides that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.) Set/Rarity: Ice Age common Price: $0.13

Name: Coordinated Barrage Cost: W Type: Instant Rules Text: Choose a creature type. Coordinated Barrage deals damage to target attacking or blocking creature equal to the number of permanents you control of the chosen type. Set/Rarity: Morningtide common Price: $0.18

Name: Coordinated Charge Cost: 4W Type: Instant Rules Text: Creatures you control get +2/+1 until end of turn. Cycling {2} ({2}, Discard this card: Draw a card.) Set/Rarity: Ikoria: Lair of Behemoths common Price: $0.04

Name: Coordinated Maneuver Cost: 1W Type: Instant Rules Text: Choose one -- - Coordinated Maneuver deals damage equal to the number of creatures you control to target creature or planeswalker. - Destroy target enchantment. Set/Rarity: Tarkir: Dragonstorm common Price: $0.03

Name: Copper Carapace Cost: 1 Type: Artifact -- Equipment Rules Text: Equipped creature gets +2/+2 and can't block. Equip {3} ({3}: Attach to target creature you control. Equip only as a sorcery.) Set/Rarity: Mirrodin Besieged common, Modern Masters 2015 common, The List common Price: $0.01

Name: Copper Gnomes Cost: 2 Type: Artifact Creature -- Gnome Pow/Tgh: 1/1 Rules Text: {4}, Sacrifice this creature: You may put an artifact card from your hand onto the battlefield. Set/Rarity: Urza's Saga rare Price: $1.98

Name: Copper Tablet Cost: 2 Type: Artifact Rules Text: At the beginning of each player's upkeep, this artifact deals 1 damage to that player. Set/Rarity: Limited Edition Alpha uncommon, Limited Edition Beta uncommon, Unlimited Edition uncommon, Intl. Collectors' Edition uncommon, Collectors' Edition uncommon, Masters Edition uncommon, 30th Anniversary Edition uncommon Price: $58.37

Name: Copper-Leaf Angel Cost: 5 Type: Artifact Creature -- Angel Pow/Tgh: 2/2 Rules Text: Flying {T}, Sacrifice X lands: Put X +1/+1 counters on this creature. Set/Rarity: Prophecy rare Price: $1.58

Name: Coppercoat Vanguard Cost: 1W Type: Creature -- Human Soldier Pow/Tgh: 2/2 Rules Text: Each other Human you control gets +1/+0 and has ward {1}. (Whenever it becomes the target of a spell or ability an opponent controls, counter it unless that player pays {1}.) Set/Rarity: March of the Machine: The Aftermath uncommon Price: $0.15

Name: Coral Helm Cost: 3 Type: Artifact Rules Text: {3}, Discard a card at random: Target creature gets +2/+2 until end of turn. Set/Rarity: Antiquities rare, Fourth Edition rare, Fourth Edition Foreign Black Border rare, Rinascimento uncommon, Renaissance uncommon, Fifth Edition rare, Masters Edition IV uncommon Price: $0.24

Name: Cordial Vampire Cost: BB Type: Creature -- Vampire Pow/Tgh: 1/1 Rules Text: Whenever this creature or another creature dies, put a +1/+1 counter on each Vampire you control. Set/Rarity: Modern Horizons rare, Jumpstart: Historic Horizons rare, Crimson Vow Commander rare, The Lost Caverns of Ixalan Commander rare Price: $1.20

Name: Core Prowler Cost: 4 Type: Artifact Creature -- Phyrexian Horror Pow/Tgh: 2/2 Rules Text: Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.) When this creature dies, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.) Set/Rarity: Mirrodin Besieged uncommon Price: $0.44

Name: Coretapper Cost: 2 Type: Artifact Creature -- Myr Pow/Tgh: 1/1 Rules Text: {T}: Put a charge counter on target artifact. Sacrifice this creature: Put two charge counters on target artifact. Set/Rarity: Darksteel uncommon, Double Masters uncommon, Edge of Eternities Commander uncommon Price: $0.19