Name: Noxious Hatchling Cost: 3{B/G} Type: Creature -- Elemental Pow/Tgh: 6/6 Rules Text: This creature enters with four -1/-1 counters on it. Wither (This deals damage to creatures in the form of -1/-1 counters.) Whenever you cast a black spell, remove a -1/-1 counter from this creature. Whenever you cast a green spell, remove a -1/-1 counter from this creature. Set/Rarity: Eventide uncommon Price: $0.22

Name: Noyan Dar, Roil Shaper Cost: 3WU Type: Legendary Creature -- Merfolk Ally Pow/Tgh: 4/4 Rules Text: Whenever you cast an instant or sorcery spell, you may put three +1/+1 counters on target land you control. If you do, that land becomes a 0/0 Elemental creature with haste that's still a land. Set/Rarity: Battle for Zendikar rare, Battle for Zendikar Promos rare Price: $0.14

Name: Null Elemental Blast Cost: C Type: Instant Rules Text: Choose one -- - Counter target multicolored spell. - Destroy target multicolored permanent. Set/Rarity: Modern Horizons 3 uncommon Price: $0.27

Name: Nulldrifter Cost: 7 Type: Creature -- Eldrazi Elemental Pow/Tgh: 4/4 Rules Text: When you cast this spell, draw two cards. Flying Annihilator 1 (Whenever this creature attacks, defending player sacrifices a permanent of their choice.) Evoke {2}{U} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters.) Set/Rarity: Modern Horizons 3 rare, Modern Horizons 3 Promos rare Price: $0.98

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: $0.21

Name: Nyxbloom Ancient Cost: 4GGG Type: Enchantment Creature -- Elemental Pow/Tgh: 5/5 Rules Text: Trample If you tap a permanent for mana, it produces three times as much of that mana instead. Set/Rarity: Magic Online Promos mythic, Secret Lair Drop mythic, Theros Beyond Death mythic, Theros Beyond Death Promos mythic, Final Fantasy: Through the Ages mythic Price: $19.73

Name: Obsidian Fireheart Cost: 1RRR Type: Creature -- Elemental Pow/Tgh: 4/4 Rules Text: {1}{R}{R}: Put a blaze counter on target land without a blaze counter on it. For as long as that land has a blaze counter on it, it has "At the beginning of your upkeep, this land deals 1 damage to you." (The land continues to burn after this creature has left the battlefield.) Set/Rarity: Zendikar mythic, Archenemy: Nicol Bolas mythic Price: $0.75

Name: Obuun, Mul Daya Ancestor Cost: 1RGW Type: Legendary Creature -- Elf Spirit Pow/Tgh: 3/3 Rules Text: At the beginning of combat on your turn, up to one target land you control becomes an X/X Elemental creature with trample and haste until end of turn, where X is Obuun's power. It's still a land. Landfall -- Whenever a land you control enters, put a +1/+1 counter on target creature. Set/Rarity: Magic Online Promos mythic, Zendikar Rising Commander mythic Price: $0.52

Name: Octavia, Living Thesis Cost: 8UU Type: Legendary Creature -- Elemental Octopus Pow/Tgh: 8/8 Rules Text: This spell costs {8} less to cast if you have eight or more instant and/or sorcery cards in your graveyard. Ward {8} Magecraft -- Whenever you cast or copy an instant or sorcery spell, target creature has base power and toughness 8/8 until end of turn. Set/Rarity: Magic Online Promos rare, Commander 2021 rare, Outlaws of Thunder Junction Commander rare Price: $0.39

Name: Offalsnout Cost: 2B Type: Creature -- Elemental Pow/Tgh: 2/2 Rules Text: Flash When this creature leaves the battlefield, exile target card from a graveyard. Evoke {B} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters.) Set/Rarity: Morningtide uncommon, Ultimate Masters common Price: $0.03

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: $1.07

Name: Omen of Fire Cost: 3RR Type: Instant Rules Text: Return all Islands to their owners' hands. Each player sacrifices a Plains or a white permanent of their choice for each white permanent they control. Set/Rarity: Alliances rare Price: $1.09

Name: Omnath, Locus of All Cost: WU{B/P}RG Type: Legendary Creature -- Phyrexian Elemental Pow/Tgh: 4/4 Rules Text: If you would lose unspent mana, that mana becomes black instead. At the beginning of your first main phase, look at the top card of your library. You may reveal that card if it has three or more colored mana symbols in its mana cost. If you do, add three mana in any combination of its colors and put it into your hand. If you don't reveal it, put it into your hand. Set/Rarity: March of the Machine rare, March of the Machine Promos rare Price: $0.32

Name: Omnath, Locus of Creation Cost: RGWU Type: Legendary Creature -- Elemental Pow/Tgh: 4/4 Rules Text: When Omnath enters, draw a card. Landfall -- Whenever a land you control enters, you gain 4 life if this is the first time this ability has resolved this turn. If it's the second time, add {R}{G}{W}{U}. If it's the third time, Omnath deals 4 damage to each opponent and each planeswalker you don't control. Set/Rarity: Magic Online Promos mythic, Secret Lair Drop mythic, Zendikar Rising Promos mythic, Zendikar Rising mythic, Store Championships mythic Price: $2.63

Name: Omnath, Locus of Mana Cost: 2G Type: Legendary Creature -- Elemental Pow/Tgh: 1/1 Rules Text: You don't lose unspent green mana as steps and phases end. Omnath gets +1/+1 for each unspent green mana you have. Set/Rarity: Worldwake mythic, From the Vault: Legends mythic, Commander Collection: Green mythic, Commander Masters mythic Price: $3.04

Name: Omnath, Locus of Rage Cost: 3RRGG Type: Legendary Creature -- Elemental Pow/Tgh: 5/5 Rules Text: Landfall -- Whenever a land you control enters, create a 5/5 red and green Elemental creature token. Whenever Omnath or another Elemental you control dies, Omnath deals 3 damage to any target. Set/Rarity: Battle for Zendikar mythic, Battle for Zendikar Promos mythic, Secret Lair Drop mythic, Zendikar Rising Commander mythic, The List mythic, Explorer Anthology 3 mythic, Outlaws of Thunder Junction Commander mythic, Edge of Eternities Commander mythic Price: $0.59

Name: Omnath, Locus of the Roil Cost: 1GUR Type: Legendary Creature -- Elemental Pow/Tgh: 3/3 Rules Text: When Omnath enters, it deals damage to any target equal to the number of Elementals you control. Landfall -- Whenever a land you control enters, put a +1/+1 counter on target Elemental you control. If you control eight or more lands, draw a card. Set/Rarity: Core Set 2020 Promos mythic, Core Set 2020 mythic Price: $6.94

Name: Ondu Rising Cost: 1W Type: Sorcery Rules Text: Whenever a creature attacks this turn, it gains lifelink until end of turn. Awaken 4--{4}{W} (If you cast this spell for {4}{W}, also put four +1/+1 counters on target land you control and it becomes a 0/0 Elemental creature with haste. It's still a land.) Set/Rarity: Battle for Zendikar uncommon Price: $0.10

Name: Open Fire Cost: 2R Type: Instant Rules Text: Open Fire deals 3 damage to any target. Set/Rarity: Hour of Devastation common, Amonkhet Remastered common, Foundations Jumpstart common Price: $0.04

Name: Orchard Elemental Cost: 5G Type: Creature -- Elemental Pow/Tgh: 2/2 Rules Text: Council's dilemma -- When this creature enters, starting with you, each player votes for sprout or harvest. Put two +1/+1 counters on this creature for each sprout vote. You gain 3 life for each harvest vote. Set/Rarity: Conspiracy: Take the Crown common Price: $0.12