Name: Nyxathid Cost: 1BB Type: Creature -- Elemental Pow/Tgh: 7/7 Rules Text: As this creature enters, choose an opponent. This creature gets -1/-1 for each card in the chosen player's hand. Set/Rarity: Conflux rare, Battlebond rare, Jumpstart rare Price: $0.17

Name: Nyxborn Courser Cost: 1WW Type: Enchantment Creature -- Centaur Scout Pow/Tgh: 2/4 Rules Text: Set/Rarity: Theros Beyond Death common Price: $0.01

Name: Nyxborn Eidolon Cost: 1B Type: Enchantment Creature -- Spirit Pow/Tgh: 2/1 Rules Text: Bestow {4}{B} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached.) Enchanted creature gets +2/+1. Set/Rarity: Born of the Gods common Price: $0.04

Name: Nyxborn Marauder Cost: 2BB Type: Enchantment Creature -- Minotaur Pow/Tgh: 4/3 Rules Text: Set/Rarity: Theros Beyond Death common Price: $0.04

Name: Nyxborn Shieldmate Cost: W Type: Enchantment Creature -- Human Soldier Pow/Tgh: 1/2 Rules Text: Bestow {2}{W} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached.) Enchanted creature gets +1/+2. Set/Rarity: Born of the Gods common Price: $0.08

Name: Nyxborn Unicorn Cost: 1W Type: Enchantment Creature -- Unicorn Pow/Tgh: 2/2 Rules Text: Bestow {3}{W} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached.) Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.) Enchanted creature gets +2/+2 and has mentor. Set/Rarity: Modern Horizons 3 common Price: $0.04

Name: O-Naginata Cost: 1 Type: Artifact -- Equipment Rules Text: This Equipment can be attached only to a creature with power 3 or greater. Equipped creature gets +3/+0 and has trample. Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.) Set/Rarity: Saviors of Kamigawa uncommon, Double Masters uncommon, The List uncommon Price: $0.55

Name: Oaken Brawler Cost: 3W Type: Creature -- Treefolk Warrior Pow/Tgh: 2/4 Rules Text: When this creature enters, clash with an opponent. If you win, put a +1/+1 counter on this creature. (Each clashing player reveals the top card of their library, then puts that card on their choice of the top or bottom. A player wins if their card had a greater mana value.) Set/Rarity: Lorwyn common, The List common Price: $0.09

Name: Oasis Type: Land Rules Text: {T}: Prevent the next 1 damage that would be dealt to target creature this turn. Set/Rarity: Arabian Nights uncommon, Fourth Edition uncommon, Fourth Edition Foreign Black Border uncommon, Rinascimento uncommon, Renaissance uncommon, Masters Edition IV common Price: $0.25

Name: Oasis Gardener Cost: 3 Type: Artifact Creature -- Scarecrow Pow/Tgh: 2/2 Rules Text: When this creature enters, you gain 2 life. {T}: Add one mana of any color. Set/Rarity: Outlaws of Thunder Junction common Price: $0.08

Name: Oath of Ghouls Cost: 1B Type: Enchantment Rules Text: At the beginning of each player's upkeep, that player chooses target player whose graveyard has fewer creature cards in it than their graveyard does and is their opponent. The first player may return a creature card from their graveyard to their hand. Set/Rarity: Exodus rare Price: $3.52

Name: Oath of Gideon Cost: 2W Type: Legendary Enchantment Rules Text: When Oath of Gideon enters, create two 1/1 white Kor Ally creature tokens. Each planeswalker you control enters with an additional loyalty counter on it. Set/Rarity: Oath of the Gatewatch rare, Oath of the Gatewatch Promos rare, Commander Masters rare, Pioneer Masters uncommon Price: $0.22

Name: Oath of Kaya Cost: 1WB Type: Legendary Enchantment Rules Text: When Oath of Kaya enters, it deals 3 damage to any target and you gain 3 life. Whenever an opponent attacks a planeswalker you control with one or more creatures, Oath of Kaya deals 2 damage to that player and you gain 2 life. Set/Rarity: War of the Spark rare, War of the Spark Promos rare Price: $0.22

Name: Oath of Lieges Cost: 1W Type: Enchantment Rules Text: At the beginning of each player's upkeep, that player chooses target player who controls more lands than they do and is their opponent. The first player may search their library for a basic land card, put that card onto the battlefield, then shuffle. Set/Rarity: Exodus rare, The List rare Price: $3.79

Name: Oath of Liliana Cost: 2B Type: Legendary Enchantment Rules Text: When Oath of Liliana enters, each opponent sacrifices a creature of their choice. At the beginning of each end step, if a planeswalker entered the battlefield under your control this turn, create a 2/2 black Zombie creature token. Set/Rarity: Eldritch Moon rare, Eldritch Moon Promos rare, Pioneer Masters uncommon Price: $0.41

Name: Oath of Lim-Dûl Cost: 3B Type: Enchantment Rules Text: Whenever you lose life, for each 1 life you lost, sacrifice a permanent other than this enchantment unless you discard a card. (Damage dealt to you causes you to lose life.) {B}{B}: Draw a card. Set/Rarity: Ice Age rare Price: $0.58

Name: Oath of the Grey Host Cost: 3B Type: Enchantment -- Saga Rules Text: (As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.) I -- You and target opponent each create a Food token. II -- Each opponent loses 3 life. Create a Treasure token. III -- Create three tapped 1/1 white Spirit creature tokens with flying. Set/Rarity: The Lord of the Rings: Tales of Middle-earth uncommon Price: $0.06

Name: Oathkeeper, Takeno's Daisho Cost: 3 Type: Legendary Artifact -- Equipment Rules Text: Equipped creature gets +3/+1. Whenever equipped creature dies, return that card to the battlefield under your control if it's a Samurai card. When Oathkeeper is put into a graveyard from the battlefield, exile equipped creature. Equip {2} Set/Rarity: Champions of Kamigawa rare Price: $15.13

Name: Oathsworn Giant Cost: 4WW Type: Creature -- Giant Soldier Pow/Tgh: 3/4 Rules Text: Vigilance Other creatures you control get +0/+2 and have vigilance. Set/Rarity: Ravnica: City of Guilds uncommon, The List uncommon Price: $0.23

Name: Oathsworn Knight Cost: 1BB Type: Creature -- Human Knight Pow/Tgh: 0/0 Rules Text: This creature enters with four +1/+1 counters on it. This creature attacks each combat if able. If damage would be dealt to this creature while it has a +1/+1 counter on it, prevent that damage and remove a +1/+1 counter from it. Set/Rarity: Throne of Eldraine rare, Throne of Eldraine Promos rare Price: $0.25