Name: Ob Nixilis's Cruelty Cost: 2B Type: Instant Rules Text: Target creature gets -5/-5 until end of turn. If that creature would die this turn, exile it instead. Set/Rarity: War of the Spark common, Jumpstart 2022 common, Pioneer Masters common Price: $0.05

Name: Ob Nixilis, Unshackled Cost: 4BB Type: Legendary Creature -- Demon Pow/Tgh: 4/4 Rules Text: Flying, trample Whenever an opponent searches their library, that player sacrifices a creature of their choice and loses 10 life. Whenever another creature dies, put a +1/+1 counter on Ob Nixilis. Set/Rarity: Magic 2015 Promos rare, Magic 2015 rare, Double Masters 2022 rare Price: $2.66

Name: Ob Nixilis, the Fallen Cost: 3BB Type: Legendary Creature -- Demon Pow/Tgh: 3/3 Rules Text: Landfall -- Whenever a land you control enters, you may have target player lose 3 life. If you do, put three +1/+1 counters on Ob Nixilis. Set/Rarity: Zendikar mythic, Iconic Masters mythic, The List mythic, Secret Lair Countdown mythic, Tarkir: Dragonstorm Commander mythic Price: $1.08

Name: Ob Nixilis, the Hate-Twisted Cost: 3BB Type: Legendary Planeswalker -- Nixilis Loyalty: 5 Rules Text: Whenever an opponent draws a card, Ob Nixilis deals 1 damage to that player. [−2]: Destroy target creature. Its controller draws two cards. Set/Rarity: Magic Online Promos uncommon, War of the Spark uncommon, War of the Spark Promos uncommon, Secret Lair Drop uncommon, Jumpstart 2022 uncommon Price: $0.67

Name: Obelisk of Undoing Cost: 1 Type: Artifact Rules Text: {6}, {T}: Return target permanent you both own and control to your hand. Set/Rarity: Antiquities rare, Chronicles rare, Chronicles Foreign Black Border rare, Rinascimento uncommon, Fifth Edition rare, Masters Edition IV rare Price: $0.27

Name: Obelisk of Urd Cost: 6 Type: Artifact Rules Text: Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) As this artifact enters, choose a creature type. Creatures you control of the chosen type get +2/+2. Set/Rarity: Magic 2015 rare, Zendikar Rising Commander rare Price: $3.00

Name: Oblation Cost: 2W Type: Instant Rules Text: The owner of target nonland permanent shuffles it into their library, then draws two cards. Set/Rarity: Onslaught rare, Commander 2011 rare, Commander 2014 rare, Commander 2016 rare, Commander 2021 rare Price: $0.60

Name: Oblivion Crown Cost: 1B Type: Enchantment -- Aura Rules Text: Flash (You may cast this spell any time you could cast an instant.) Enchant creature Enchanted creature has "Discard a card: This creature gets +1/+1 until end of turn." Set/Rarity: Future Sight common Price: $0.33

Name: Oblivion Ring Cost: 2W Type: Enchantment Rules Text: When this enchantment enters, exile another target nonland permanent. When this enchantment leaves the battlefield, return the exiled card to the battlefield under its owner's control. Set/Rarity: Magic Online Promos common, Lorwyn common, Shards of Alara common, Friday Night Magic 2009 rare, Planechase common, Archenemy common, Magic Online Theme Decks common, Duel Decks: Knights vs. Dragons common, Commander 2011 common, Magic 2012 uncommon, Duel Decks: Venser vs. Koth uncommon, Magic 2013 uncommon, Modern Masters 2015 uncommon, The List common Price: $0.12

Name: Oblivion Sower Cost: 6 Type: Creature -- Eldrazi Pow/Tgh: 5/8 Rules Text: When you cast this spell, target opponent exiles the top four cards of their library, then you may put any number of land cards that player owns from exile onto the battlefield under your control. Set/Rarity: Magic Online Promos mythic, Duel Decks: Zendikar vs. Eldrazi mythic, Battle for Zendikar mythic, Battle for Zendikar Promos mythic, Commander Masters mythic, Outlaws of Thunder Junction Commander mythic, Modern Horizons 3 Commander mythic Price: $0.41

Name: Oblivion Stone Cost: 3 Type: Artifact Rules Text: {4}, {T}: Put a fate counter on target permanent. {5}, {T}, Sacrifice this artifact: Destroy each nonland permanent without a fate counter on it, then remove all fate counters from all permanents. Set/Rarity: Mirrodin rare, Commander 2011 rare, Kaladesh Inventions special, Iconic Masters rare, Commander Anthology Volume II rare, Double Masters rare, New Capenna Commander rare, The Brothers' War Commander rare, Modern Horizons 3 Commander rare Price: $0.26

Name: Oblivion Strike Cost: 3B Type: Sorcery Rules Text: Devoid (This card has no color.) Exile target creature. Set/Rarity: Oath of the Gatewatch common, The List common Price: $0.05

Name: Oblivion's Hunger Cost: 1B Type: Instant Rules Text: Target creature you control gains indestructible until end of turn. Draw a card if that creature has a +1/+1 counter on it. (Damage and effects that say "destroy" don't destroy the creature.) Set/Rarity: Zendikar Rising common Price: $0.08

Name: Obscura Storefront Type: Land Rules Text: When this land enters, sacrifice it. When you do, search your library for a basic Plains, Island, or Swamp card, put it onto the battlefield tapped, then shuffle and you gain 1 life. Set/Rarity: Streets of New Capenna common, Duskmourn: House of Horror Commander common Price: $0.30

Name: Observant Alseid Cost: 2W Type: Enchantment Creature -- Nymph Pow/Tgh: 2/2 Rules Text: Bestow {4}{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.) Vigilance Enchanted creature gets +2/+2 and has vigilance. Set/Rarity: Theros common Price: $0.03

Name: Obsessive Pursuit Cost: 1B Type: Enchantment Rules Text: When this enchantment enters and at the beginning of your upkeep, you lose 1 life and create a Clue token. (It's an artifact with "{2}, Sacrifice this token: Draw a card.") Whenever you attack, put X +1/+1 counters on target attacking creature, where X is the number of permanents you've sacrificed this turn. If X is three or greater, that creature gains lifelink until end of turn. Set/Rarity: Avatar: The Last Airbender Promos rare, Avatar: The Last Airbender rare Price: $0.43

Name: Obsianus Golem Cost: 6 Type: Artifact Creature -- Golem Pow/Tgh: 4/6 Rules Text: Set/Rarity: Limited Edition Alpha uncommon, Limited Edition Beta uncommon, Unlimited Edition uncommon, Collectors' Edition uncommon, Intl. Collectors' Edition uncommon, Foreign Black Border uncommon, Revised Edition uncommon, Summer Magic / Edgar uncommon, Fourth Edition Foreign Black Border uncommon, Fourth Edition uncommon, Classic Sixth Edition uncommon, Masters Edition IV common, 30th Anniversary Edition uncommon Price: $0.12

Name: Obsidian Acolyte Cost: 1W Type: Creature -- Human Cleric Pow/Tgh: 1/1 Rules Text: Protection from black {W}: Target creature gains protection from black until end of turn. Set/Rarity: Invasion common Price: $0.36

Name: Obsidian Battle-Axe Cost: 3 Type: Kindred Artifact -- Warrior Equipment Rules Text: Equipped creature gets +2/+1 and has haste. Whenever a Warrior creature enters, you may attach this Equipment to it. Equip {3} Set/Rarity: Morningtide uncommon, Salvat 2011 uncommon Price: $0.39

Name: Obsidian Obelisk Cost: 2 Type: Artifact Rules Text: This artifact enters tapped. {T}: Add {C}. {T}: Add one mana of any color. Spend this mana only to cast a multicolored spell. Set/Rarity: Dominaria United Commander rare Price: $0.61