Name: Olivia's Wrath Cost: 4B Type: Sorcery Rules Text: Each non-Vampire creature gets -X/-X until end of turn, where X is the number of Vampires you control. Set/Rarity: Crimson Vow Commander rare, The Lost Caverns of Ixalan Commander rare Price: $0.53

Name: Ollenbock Escort Cost: W Type: Creature -- Human Cleric Pow/Tgh: 1/1 Rules Text: Vigilance Sacrifice this creature: Target creature you control with a +1/+1 counter on it gains lifelink and indestructible until end of turn. Set/Rarity: Innistrad: Crimson Vow uncommon, Innistrad: Double Feature uncommon Price: $0.10

Name: Oltec Archaeologists Cost: 4W Type: Creature -- Human Artificer Scout Pow/Tgh: 4/4 Rules Text: When this creature enters, choose one -- - Return target artifact card from your graveyard to your hand. - Scry 3. (Look at the top three cards of your library, then put any number of them on the bottom and the rest on top in any order.) Set/Rarity: The Lost Caverns of Ixalan common Price: $0.02

Name: Oltec Cloud Guard Cost: 3W Type: Creature -- Human Soldier Pow/Tgh: 3/2 Rules Text: Flying When this creature enters, create a 1/1 colorless Gnome artifact creature token. Set/Rarity: The Lost Caverns of Ixalan common Price: $0.05

Name: Oltec Matterweaver Cost: 2W Type: Creature -- Human Artificer Pow/Tgh: 2/4 Rules Text: Whenever you cast a creature spell, choose one -- - Create a 1/1 colorless Gnome artifact creature token. - Create a token that's a copy of target artifact token you control. Set/Rarity: Wizards Play Network 2024 mythic, The Big Score mythic Price: $1.26

Name: Omarthis, Ghostfire Initiate Cost: XX Type: Legendary Creature -- Spirit Snake Pow/Tgh: 0/0 Rules Text: Omarthis enters with X +1/+1 counters on it. Whenever you put one or more +1/+1 counters on another colorless creature, you may put a +1/+1 counter on Omarthis. When Omarthis dies, manifest a number of cards from the top of your library equal to the number of counters on it. Set/Rarity: Commander Masters mythic Price: $1.01

Name: Omega Myr Cost: 2 Type: Artifact Creature -- Myr Pow/Tgh: 1/2 Rules Text: Set/Rarity: Mirrodin common Price: $0.13

Name: Omen Machine Cost: 6 Type: Artifact Rules Text: Players can't draw cards. At the beginning of each player's draw step, that player exiles the top card of their library. If it's a land card, the player puts it onto the battlefield. Otherwise, the player casts it without paying its mana cost if able. Set/Rarity: New Phyrexia rare Price: $2.92

Name: Omen of the Dead Cost: B Type: Enchantment Rules Text: Flash When this enchantment enters, return target creature card from your graveyard to your hand. {2}{B}, Sacrifice this enchantment: Scry 2. Set/Rarity: Theros Beyond Death common Price: $0.19

Name: Omen of the Sun Cost: 2W Type: Enchantment Rules Text: Flash When this enchantment enters, create two 1/1 white Human Soldier creature tokens and you gain 2 life. {2}{W}, Sacrifice this enchantment: Scry 2. Set/Rarity: Theros Beyond Death common, The List common, Commander Masters common Price: $0.09

Name: Omenport Vigilante Cost: 1W Type: Creature -- Human Mercenary Pow/Tgh: 2/2 Rules Text: This creature has double strike as long as you've committed a crime this turn. (Targeting opponents, anything they control, and/or cards in their graveyards is a crime.) Set/Rarity: Outlaws of Thunder Junction uncommon Price: $0.04

Name: Ominous Cemetery Type: Land Rules Text: {T}: Add {C}. {5}, {T}, Exile this land: Target creature's owner shuffles it into their library. Set/Rarity: Doctor Who uncommon Price: $0.24

Name: Ominous Harvest Cost: 2B Type: Sorcery Rules Text: Gravestorm (When you cast this spell, copy it for each permanent put into a graveyard from the battlefield this turn.) Target player draws a card and loses 1 life. Set/Rarity: Secrets of Strixhaven Commander rare Price: $1.66

Name: Ominous Parcel Cost: 1 Type: Artifact Rules Text: {2}, {T}, Sacrifice this artifact: Search your library for a basic land card, reveal it, put it into your hand, then shuffle. {5}, {T}, Sacrifice this artifact: It deals 4 damage to target creature. Set/Rarity: Streets of New Capenna common Price: $0.04

Name: Omni-Cheese Pizza Cost: 2 Type: Artifact -- Food Rules Text: When this artifact enters, draw a card. {1}, {T}, Sacrifice this artifact: Add one mana of any color. {2}, {T}, Sacrifice this artifact: You gain 3 life. Set/Rarity: Teenage Mutant Ninja Turtles common Price: $0.10

Name: On Alert Cost: 2W Type: Instant -- Adventure Rules Text: Target creature gets +2/+2 until end of turn. Untap it. (Then exile this card. You may cast the creature later from exile.) [Related to Silverflame Squire.] Set/Rarity: Magic Online Promos common, Throne of Eldraine common, The List common Price: $0.06

Name: On Serra's Wings Cost: 3W Type: Legendary Enchantment -- Aura Rules Text: Enchant creature Enchanted creature is legendary, gets +1/+1, and has flying, vigilance, and lifelink. Set/Rarity: Dominaria uncommon, The List uncommon, Commander Legends uncommon Price: $0.22

Name: On Thin Ice Cost: W Type: Snow Enchantment -- Aura Rules Text: Enchant snow land you control When this Aura enters, exile target creature an opponent controls until this Aura leaves the battlefield. Set/Rarity: Modern Horizons rare Price: $0.74

Name: On Wings of Gold Cost: 3W Type: Enchantment Rules Text: Creatures you control that are Zombies and/or tokens get +1/+1 and have flying. Whenever one or more cards leave your graveyard, create a 1/1 white Zombie creature token. Set/Rarity: Aetherdrift Commander rare Price: $0.61

Name: On the Job Cost: 2WW Type: Instant Rules Text: Creatures you control get +2/+1 until end of turn. Investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.") Set/Rarity: Murders at Karlov Manor common Price: $0.02