Name: Boneyard Parley Cost: 5BB Type: Sorcery Rules Text: Exile up to five target creature cards from graveyards. An opponent separates those cards into two piles. Put all cards from the pile of your choice onto the battlefield under your control and the rest into their owners' graveyards. Set/Rarity: Ixalan mythic, Ixalan Promos mythic, Commander 2019 mythic Price: $0.29

Name: Boneyard Scourge Cost: 2BB Type: Creature -- Zombie Dragon Pow/Tgh: 4/3 Rules Text: Flying Whenever a Dragon you control dies while this card is in your graveyard, you may pay {1}{B}. If you do, return this card from your graveyard to the battlefield. Set/Rarity: Treasure Chest rare, Commander 2017 rare Price: $5.86

Name: Bontu the Glorified Cost: 2B Type: Legendary Creature -- God Pow/Tgh: 4/6 Rules Text: Menace, indestructible Bontu can't attack or block unless a creature died under your control this turn. {1}{B}, Sacrifice another creature: Scry 1. Each opponent loses 1 life and you gain 1 life. Set/Rarity: Amonkhet Invocations special, Amonkhet Promos mythic, Amonkhet mythic, Amonkhet Remastered mythic Price: $2.00

Name: Bontu's Last Reckoning Cost: 1BB Type: Sorcery Rules Text: Destroy all creatures. Lands you control don't untap during your next untap step. Set/Rarity: Hour of Devastation rare, Hour of Devastation Promos rare, Amonkhet Remastered rare Price: $0.58

Name: Bontu's Monument Cost: 3 Type: Legendary Artifact Rules Text: Black creature spells you cast cost {1} less to cast. Whenever you cast a creature spell, each opponent loses 1 life and you gain 1 life. Set/Rarity: Amonkhet uncommon, Amonkhet Remastered uncommon, Dominaria United Commander uncommon, Aetherdrift Commander uncommon Price: $3.58

Name: Booby Trap Cost: 6 Type: Artifact Rules Text: As this artifact enters, choose an opponent and a card name other than a basic land card name. The chosen player reveals each card they draw. When the chosen player draws a card with the chosen name, sacrifice this artifact. If you do, this artifact deals 10 damage to that player. Set/Rarity: Tempest rare, Ninth Edition rare, Salvat 2005 rare Price: $0.36

Name: Book of Rass Cost: 6 Type: Artifact Rules Text: {2}, Pay 2 life: Draw a card. Set/Rarity: The Dark uncommon, Chronicles Foreign Black Border rare, Chronicles rare, Masters Edition IV uncommon Price: $0.46

Name: Boom Box Cost: 2 Type: Artifact Rules Text: {6}, {T}, Sacrifice this artifact: Destroy up to one target artifact, up to one target creature, and up to one target land. Set/Rarity: Outlaws of Thunder Junction uncommon Price: $0.13

Name: Boompile Cost: 4 Type: Artifact Rules Text: {T}: Flip a coin. If you win the flip, destroy all nonland permanents. Set/Rarity: Commander 2016 rare, Treasure Chest rare, The List rare, Commander Masters rare Price: $0.59

Name: Boon Reflection Cost: 4W Type: Enchantment Rules Text: If you would gain life, you gain twice that much life instead. Set/Rarity: Shadowmoor rare, Double Masters rare Price: $13.22

Name: Boon of Emrakul Cost: 2B Type: Enchantment -- Aura Rules Text: Enchant creature Enchanted creature gets +3/-3. Set/Rarity: Eldritch Moon common, The List common Price: $0.04

Name: Boon of Erebos Cost: B Type: Instant Rules Text: Target creature gets +2/+0 until end of turn. Regenerate it. You lose 2 life. Set/Rarity: Theros common Price: $0.14

Name: Boon of Safety Cost: W Type: Instant Rules Text: Put a shield counter on target creature. (If it would be dealt damage or destroyed, remove a shield counter from it instead.) Scry 1. Set/Rarity: Streets of New Capenna common Price: $0.22

Name: Boon of the Spirit Realm Cost: 3WW Type: Enchantment Rules Text: Constellation -- Whenever this enchantment or another enchantment you control enters, put a blessing counter on this enchantment. Creatures you control get +1/+1 for each blessing counter on this enchantment. Set/Rarity: Commander Masters rare Price: $3.24

Name: Boon-Bringer Valkyrie Cost: 3WW Type: Creature -- Angel Warrior Pow/Tgh: 4/4 Rules Text: Backup 1 (When this creature enters, put a +1/+1 counter on target creature. If that's another creature, it gains the following abilities until end of turn.) Flying, first strike, lifelink Set/Rarity: March of the Machine Promos rare, March of the Machine rare Price: $0.38

Name: Boonweaver Giant Cost: 6W Type: Creature -- Giant Monk Pow/Tgh: 4/4 Rules Text: When this creature enters, you may search your graveyard, hand, and/or library for an Aura card and put it onto the battlefield attached to this creature. If you search your library this way, shuffle. Set/Rarity: Magic 2015 uncommon, The List uncommon Price: $0.08

Name: Boot Nipper Cost: 1B Type: Creature -- Beast Pow/Tgh: 2/1 Rules Text: This creature enters with your choice of a deathtouch counter or a lifelink counter on it. Set/Rarity: Ikoria: Lair of Behemoths common Price: $0.10

Name: Border Guard Cost: 2W Type: Creature -- Human Soldier Pow/Tgh: 1/4 Rules Text: Set/Rarity: Portal common, Starter 1999 common Price: $0.17

Name: Border Patrol Cost: 4W Type: Creature -- Human Nomad Pow/Tgh: 1/6 Rules Text: Vigilance Set/Rarity: Judgment common Price: $0.13

Name: Boreal Griffin Cost: 3WW Type: Snow Creature -- Griffin Pow/Tgh: 3/2 Rules Text: Flying {S}: This creature gains first strike until end of turn. ({S} can be paid with one mana from a snow source.) Set/Rarity: Coldsnap common Price: $0.15