Rimrock Knight can't block.

Flying (This creature can't be blocked except by creatures with flying or reach.)

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

First strike

Riot Piker attacks each combat if able.

( can be paid with either or .)

Enchant creature

Enchanted creature gets +2/-1.

Reach

, Sacrifice a land: Draw a card.

Riphook Raider can't be blocked by creatures with power 2 or less.

Nightbound (If a player casts at least two spells during their own turn, it becomes day next turn.)

Tap all blue creatures.

Vigilance

When Riptide Crab dies, draw a card.

Return target creature card from your graveyard to the battlefield.

Exile target creature. Exile up to one target instant or sorcery card from a graveyard.

Learn. (You may reveal a Lesson card you own from outside the game and put it into your hand, or discard a card to draw a card.)

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

When Rishadan Cutpurse enters, each opponent sacrifices a permanent unless they pay .

As an additional cost to cast this spell, sacrifice a creature.

Rite of Consumption deals damage equal to the sacrificed creature's power to target player or planeswalker. You gain life equal to the damage dealt this way.

Destroy target creature. If that creature had a +1/+1 counter on it, create a 1/1 green Snake creature token.

Discard any number of cards. Counter target spell unless its controller pays for each card discarded this way.

Coven — At the beginning of combat on your turn, if you control three or more creatures with different powers, Ritual Guardian gains lifelink until end of turn.

Return target artifact card from your graveyard to your hand.

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

: Regenerate River Boa.

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.

: River Merfolk gains mountainwalk until end of turn. (It can't be blocked as long as defending player controls a Mountain.)

Whenever you cast a spell that's both blue and red, Riverfall Mimic has base power and toughness 3/3 until end of turn and can't be blocked this turn.

Flying

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

When Riveteers Overlook enters, sacrifice it. When you do, search your library for a basic Swamp, Mountain, or Forest card, put it onto the battlefield tapped, then shuffle and you gain 1 life.

Flying

When Roaming Ghostlight enters, return up to one target non-Spirit creature to its owner's hand.

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.

When Robo-Piñata dies, choose one —

• You get .

• You may put a sticker on a nonland permanent you own.

Mountainwalk (This creature can't be blocked as long as defending player controls a Mountain.)

Creatures named Scissors Lizard can't attack or block.

Reach

When Rock Star enters, you may discard a card. If you do, reveal the top five cards of your library. Ask a person outside the game to choose which of them is most like a rock band. Put that card into your hand and the rest on the bottom of your library in a random order.

Whenever you cast your first spell each turn, add .

When Rogue Elephant enters, sacrifice it unless you sacrifice a Forest.

Menace (This creature can't be blocked except by two or more creatures.)

When Rohirrim Lancer dies, the Ring tempts you.

Destroy target land, then Roiling Terrain deals damage to that land's controller equal to the number of land cards in that player's graveyard.

Rolling Thunder deals X damage divided as you choose among any number of targets.

Haste

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

Ronom Serpent can't attack unless defending player controls a snow land.

When you control no snow lands, sacrifice Ronom Serpent.

: Roofstalker Wight gains flying until end of turn.

Casualty 1 (As you cast this spell, you may sacrifice a creature with power 1 or greater. When you do, copy this spell and you may choose a new target for the copy.)

Tap target creature. It doesn't untap during its controller's next untap step.

Draw a card.

, , Sacrifice Root Greevil: Destroy all enchantments of the color of your choice.

Prevent all combat damage that would be dealt this turn.

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

: Add .

, : Add one mana of any color.

Mill three cards, then return a land card or Elf card from your graveyard to your hand. If you can't, draw a card. (To mill a card, put the top card of your library into your graveyard.)

Sacrifice a Forest: Regenerate Rootwater Alligator.

: Rootwater Hunter deals 1 damage to any target.

Vigilance

When Rosecot Knight enters, look at the top six cards of your library. You may reveal an artifact or enchantment card from among them and put it into your hand. Put the rest on the bottom of your library in a random order. If you didn't put a card into your hand this way, put a +1/+1 counter on Rosecot Knight.

: Add one mana of any color.

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