Name: Ruins of Trokair Type: Land Rules Text: This land enters tapped. {T}: Add {W}. {T}, Sacrifice this land: Add {W}{W}. Set/Rarity: Fallen Empires uncommon, Pro Tour Collector Set uncommon, Fifth Edition uncommon, Classic Sixth Edition uncommon, Masters Edition II uncommon Price: $0.21

Name: Rule of Law Cost: 2W Type: Enchantment Rules Text: Each player can't cast more than one spell each turn. Set/Rarity: Mirrodin rare, Tenth Edition uncommon, Core Set 2020 uncommon, Secret Lair Drop rare Price: $0.45

Name: Rumble Arena Type: Land Rules Text: Vigilance When this land enters, scry 1. (Look at the top card of your library. You may put it on the bottom.) {T}: Add {C}. {1}, {T}: Add one mana of any color. Set/Rarity: Avatar: The Last Airbender common Price: $0.24

Name: Rumbling Sentry Cost: 3WW Type: Creature -- Giant Pow/Tgh: 3/6 Rules Text: When this creature enters, scry 1. Set/Rarity: Theros Beyond Death common Price: $0.03

Name: Rumor Gatherer Cost: 1WW Type: Creature -- Elf Wizard Pow/Tgh: 2/1 Rules Text: Alliance -- Whenever another creature you control enters, scry 1. If this is the second time this ability has resolved this turn, draw a card instead. Set/Rarity: The List uncommon, Streets of New Capenna uncommon, Commander Legends: Battle for Baldur's Gate uncommon Price: $0.36

Name: Runaway Boulder Cost: 6 Type: Artifact Rules Text: Flash When this artifact enters, it deals 6 damage to target creature an opponent controls. Cycling {2} ({2}, Discard this card: Draw a card.) Set/Rarity: The Lost Caverns of Ixalan common Price: $0.11

Name: Runaway Carriage Cost: 4 Type: Artifact Creature -- Construct Pow/Tgh: 5/6 Rules Text: Trample When this creature attacks or blocks, sacrifice it at end of combat. Set/Rarity: Shadows over Innistrad uncommon Price: $0.07

Name: Runaway Trash-Bot Cost: 3 Type: Artifact Creature -- Construct Pow/Tgh: 0/4 Rules Text: Trample This creature gets +1/+0 for each artifact and/or enchantment card in your graveyard. Set/Rarity: Kamigawa: Neon Dynasty uncommon Price: $0.11

Name: Rune of Mortality Cost: 1B Type: Enchantment -- Aura Rune Rules Text: Enchant permanent When this Aura enters, draw a card. As long as enchanted permanent is a creature, it has deathtouch. As long as enchanted permanent is an Equipment, it has "Equipped creature has deathtouch." Set/Rarity: Kaldheim uncommon Price: $0.23

Name: Rune of Protection: Artifacts Cost: 1W Type: Enchantment Rules Text: {W}: The next time an artifact source of your choice would deal damage to you this turn, prevent that damage. Cycling {2} ({2}, Discard this card: Draw a card.) Set/Rarity: Urza's Saga uncommon Price: $0.26

Name: Rune of Protection: Black Cost: 1W Type: Enchantment Rules Text: {W}: The next time a black source of your choice would deal damage to you this turn, prevent that damage. Cycling {2} ({2}, Discard this card: Draw a card.) Set/Rarity: Urza's Saga common Price: $0.18

Name: Rune of Protection: Blue Cost: 1W Type: Enchantment Rules Text: {W}: The next time a blue source of your choice would deal damage to you this turn, prevent that damage. Cycling {2} ({2}, Discard this card: Draw a card.) Set/Rarity: Urza's Saga common Price: $0.19

Name: Rune of Protection: Green Cost: 1W Type: Enchantment Rules Text: {W}: The next time a green source of your choice would deal damage to you this turn, prevent that damage. Cycling {2} ({2}, Discard this card: Draw a card.) Set/Rarity: Urza's Saga common Price: $0.15

Name: Rune of Protection: Lands Cost: 1W Type: Enchantment Rules Text: {W}: The next time a land source of your choice would deal damage to you this turn, prevent that damage. Cycling {2} ({2}, Discard this card: Draw a card.) Set/Rarity: Urza's Saga rare, The List rare Price: $0.47

Name: Rune of Protection: Red Cost: 1W Type: Enchantment Rules Text: {W}: The next time a red source of your choice would deal damage to you this turn, prevent that damage. Cycling {2} ({2}, Discard this card: Draw a card.) Set/Rarity: Urza's Saga common Price: $0.21

Name: Rune of Protection: White Cost: 1W Type: Enchantment Rules Text: {W}: The next time a white source of your choice would deal damage to you this turn, prevent that damage. Cycling {2} ({2}, Discard this card: Draw a card.) Set/Rarity: Urza's Saga common Price: $0.18

Name: Rune of Sustenance Cost: 1W Type: Enchantment -- Aura Rune Rules Text: Enchant permanent When this Aura enters, draw a card. As long as enchanted permanent is a creature, it has lifelink. As long as enchanted permanent is an Equipment, it has "Equipped creature has lifelink." Set/Rarity: Kaldheim uncommon Price: $0.32

Name: Rune-Scarred Demon Cost: 5BB Type: Creature -- Demon Pow/Tgh: 6/6 Rules Text: Flying When this creature enters, search your library for a card, put it into your hand, then shuffle. Set/Rarity: Magic 2012 rare, Iconic Masters rare, Secret Lair Drop rare, The List rare, Commander Masters rare, Foundations Promos rare, Foundations rare Price: $0.53

Name: Rune-Tail's Essence Type: Legendary Enchantment Rules Text: Prevent all damage that would be dealt to creatures you control. [Flips from Rune-Tail, Kitsune Ascendant.] Set/Rarity: Saviors of Kamigawa rare, The List rare Price: $3.74

Name: Rune-Tail, Kitsune Ascendant Cost: 2W Type: Legendary Creature -- Fox Monk Pow/Tgh: 2/2 Rules Text: When you have 30 or more life, flip Rune-Tail. [Flips into Rune-Tail's Essence.] Set/Rarity: Saviors of Kamigawa rare, The List rare Price: $3.74