Whenever you cast a kicked spell, Risen Riptide has base power and toughness 5/5 until end of turn.

Flying

When Rishadan Brigand enters, each opponent sacrifices a permanent of their choice unless they pay .

Rishadan Brigand can block only creatures with flying.

Islandwalk (This creature can't be blocked as long as defending player controls an Island.)

, : Tap target land.

, : Shuffle target nontoken permanent you control into its owner's library.

When Rishkar, Peema Renegade enters, put a +1/+1 counter on each of up to two target creatures.

Each creature you control with a counter on it has ": Add ."

Haste

Whenever Risona, Asari Commander deals combat damage to a player, if it doesn't have an indestructible counter on it, put an indestructible counter on it.

Whenever combat damage is dealt to you, remove an indestructible counter from Risona.

Delve (Each card you exile from your graveyard while casting this spell pays for .)

Return target nonland permanent you control and target nonland permanent you don't control to their owners' hands.

, Sacrifice Rith's Attendant: Add .

Cumulative upkeep (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)

If a land is tapped for mana, it produces colorless mana instead of any other type.

Choose two target creatures that share no creature types. Those creatures fight each other. (Each deals damage equal to its power to the other.)

River Darter can't be blocked by Dinosaurs.

Vigilance

When River Herald Guide enters, it explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.)

Put a +1/+1 counter on target creature and a +1/+1 counter on up to one target Merfolk.

: Add .

Riveteers Decoy must be blocked if able.

Blitz (If you cast this spell for its blitz cost, it gains haste and "When this creature dies, draw a card." Sacrifice it at the beginning of the next end step.)

Spectacle (You may cast this spell for its spectacle cost rather than its mana cost if an opponent lost life this turn.)

When Rix Maadi Reveler enters, discard a card, then draw a card. If Rix Maadi Reveler's spectacle cost was paid, instead discard your hand, then draw three cards.

Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

: Add .

, , Sacrifice Roadside Reliquary: Draw a card if you control an artifact. Draw a card if you control an enchantment.

Choose a creature type. Roar of the Crowd deals damage to any target equal to the number of permanents you control of the chosen type.

Return target artifact, enchantment, or legendary card from your graveyard to your hand. (Then exile this card. You may cast the creature later from exile.)

Flying

Rock Hydra enters with X +1/+1 counters on it.

For each 1 damage that would be dealt to Rock Hydra, if it has a +1/+1 counter on it, remove a +1/+1 counter from it and prevent that 1 damage.

: Prevent the next 1 damage that would be dealt to Rock Hydra this turn.

: Put a +1/+1 counter on Rock Hydra. Activate only during your upkeep.

Super haste (This may attack the turn before you cast it. (You may put this card from your hand onto the battlefield tapped and attacking during your declare attackers step. If you do, you lose the game at the beginning of your next turn's end step unless you pay this card's mana cost during that turn.))

Rockslide Ambush deals damage to target creature equal to the number of Mountains you control.

Whenever you cast an instant, sorcery, or Wizard spell, Rockslide Sorcerer deals 1 damage to any target.

, : Rod of Ruin deals 1 damage to any target.

Whenever you cast your first spell each turn, add .

Other Kobolds you control get +2/+2.

Whenever you cast a Kobold spell, you may pay . If you do, create a 4/4 red Dragon creature token with flying.

Whenever you cast a Dragon spell, create a 0/1 red Kobold creature token named Kobolds of Kher Keep.

All creatures get +2/-2 until end of turn.

When Rona, Disciple of Gix enters, you may exile target historic card from your graveyard. (Artifacts, legendaries, and Sagas are historic.)

You may cast spells from among cards exiled with Rona.

, : Exile the top card of your library.

Whenever you cast an instant or sorcery spell, each opponent loses 1 life.

You may cast Rona, Sheoldred's Faithful from your graveyard by discarding two cards in addition to paying its other costs.

Haste

Bushido 1 (Whenever this creature blocks or becomes blocked, it gets +1/+1 until end of turn.)

Kicker (You may pay an additional as you cast this spell.)

When Roost of Drakes enters, if it was kicked, create a 2/2 blue Drake creature token with flying.

Whenever you cast a kicked spell, create a 2/2 blue Drake creature token with flying.

Populate. Creatures you control gain indestructible until end of turn. (To populate, create a token that's a copy of a creature token you control.)

: Add .

, : Add one mana of any color.

Islandwalk (This creature can't be blocked as long as defending player controls an Island.)

, Sacrifice Rootwater Diver: Return target artifact card from your graveyard to your hand.

When Rope Line Attendant enters the battlefield, creature cards in your hand perpetually gain "When this creature enters the battlefield, create a 1/1 green and white Citizen creature token."

First strike

Raid — At end of combat on your turn, if you attacked this turn, create a Junk token for each opponent you attacked. (It's an artifact with ", Sacrifice this artifact: Exile the top card of your library. You may play that card this turn. Activate only as a sorcery.")

Whenever you sacrifice a Junk, add .

Other creatures you control are Assassins in addition to their other types. The same is true for creature spells you control and creature cards you own that aren't on the battlefield.

Face-down creatures you control have menace.

Whenever a permanent you control is turned face up, you draw a card and you lose 1 life.

Whenever one or more creature cards leave your graveyard, Rot Farm Mortipede gets +1/+0 and gains menace and lifelink until end of turn.

Trample

Whenever you expend 4, target creature you control gets +1/+1 and gains trample until end of turn. (You expend 4 as you spend your fourth total mana to cast spells during a turn.)

Enchant creature

When Rousing Read enters, draw two cards, then discard a card.

Enchanted creature gets +1/+1 and has flying.

Trample

When Rowdy Crew enters, draw three cards, then discard two cards at random. If two cards that share a card type are discarded this way, put two +1/+1 counters on Rowdy Crew.

Cumulative upkeep (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)

Whenever a Swamp, Mountain, black permanent, or red permanent becomes tapped, Royal Decree deals 1 damage to that permanent's controller.

Aftermath (Cast this spell only from your graveyard. Then exile it.)

Up to three target lands don't untap during their controller's next untap step.

Whenever Rubblebelt Raiders attacks, put a +1/+1 counter on it for each attacking creature you control.

Haste (This creature can attack and as soon as it comes under your control.)

Whenever Ruby attacks while you control a creature with power 4 or greater, Ruby gets +2/+2 until end of turn.

: Add or .