When Riftsweeper enters the battlefield, choose target face-up exiled card. Its owner shuffles it into their library.

Righteous Blow deals 2 damage to target attacking or blocking creature.

Rigo, Streetwise Mentor enters the battlefield with a shield counter on it. (If it would be dealt damage or destroyed, remove a shield counter from it instead.)

Whenever you attack a player or planeswalker with one or more creatures with power 1 or less, draw a card.

Flying

Rimefeather Owl's power and toughness are each equal to the number of snow permanents on the battlefield.

: Put an ice counter on target permanent.

Permanents with ice counters on them are snow.

, : Counter target activated ability. Activate only if you control four or more snow permanents. (Mana abilities can't be targeted.)

(: Add or .)

Rimewood Falls enters the battlefield tapped.

Ring of Three Wishes enters the battlefield with three wish counters on it.

, , Remove a wish counter from Ring of Three Wishes: Search your library for a card, put that card into your hand, then shuffle.

When Ringwraiths enters the battlefield, target creature an opponent controls gets -3/-3 until end of turn. If that creature is legendary, its controller loses 3 life.

When the Ring tempts you, return Ringwraiths from your graveyard to your hand.

Each player sacrifices a creature. If you sacrificed a creature this way, you may return another permanent card from your graveyard to the battlefield.

Lands don't untap during their controllers' untap steps.

At the beginning of each player's upkeep, that player untaps a land they control.

Menace

: Add two mana in any combination of colors. Spend this mana only to cast Dragon creature spells.

Once during each of your turns, you may cast a Dragon creature spell from your graveyard.

Whenever you cast a Dragon creature spell from your graveyard, it gains "When this creature dies, exile it."

Flying

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

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.

Whenever Roaring Slagwurm attacks, tap all artifacts.

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.))

Sacrifice a land. Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.

Equipped creature gets +2/+1.

Whenever a creature enters the battlefield under your control, attach Ronin Warclub to that creature.

Equip (: Attach to target creature you control. Equip only as a sorcery.)

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

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.

: Add .

: Add or . Rootwater Depths doesn't untap during your next untap step.

: Rootwater Hunter deals 1 damage to any target.

: Look at the top card of target player's library.

: Rootwater Thief gains flying until end of turn.

Whenever Rootwater Thief deals combat damage to a player, you may pay . If you do, search that player's library for a card and exile it, then the player shuffles.

, Sacrifice Rootwire Amalgam: Create an X/X colorless Golem artifact creature token, where X is three times Rootwire Amalgam's power. It gains haste until end of turn. Activate only as a sorcery.

//PRT-Prototype_Mech//

Prototype (You may cast this spell with different mana cost, color, and size. It keeps its abilities and types.)

2/3

Partner with Amy Pond

First strike, lifelink

The Last Centurion — When you cast this spell from anywhere other than exile, exile it with three time counters on it. It gains suspend. Then investigate. (Create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

When Rotcrown Ghoul dies, target player mills five cards.

+2: During target player's next turn, each creature that player controls attacks if able.

−2: Rowan Kenrith deals 3 damage to each tapped creature target player controls.

−8: Target player gets an emblem with "Whenever you activate an ability that isn't a mana ability, copy it. You may choose new targets for the copy."

Partner with Will Kenrith

Rowan Kenrith can be your commander.

+1: Up to one target creature gets +3/+0 and gains first strike until end of turn.

−2: Rowan, Fearless Sparkmage deals 1 damage to each of up to two target creatures. Those creatures can't block this turn.

−9: Gain control of all creatures until end of turn. Untap them. They gain haste until end of turn.

Menace

: Spells you cast this turn that are black and/or red cost less to cast, where X is the amount of life you lost this turn. Activate only as a sorcery.

Bargain (You may sacrifice an artifact, enchantment, or token as you cast this spell.)

If this spell was bargained, look at the top four cards of your library, then put up to two of them back on top of your library in any order and the rest into your graveyard.

You draw two cards and you lose 2 life.

Enchant planeswalker

Enchanted planeswalker has "+1: Up to one target creature gets +2/+0 and gains first strike and trample until end of turn."

Whenever you activate a loyalty ability of enchanted planeswalker, copy that ability. You may choose new targets for the copy.

This spell costs less to cast for each creature that attacked this turn.

Draw three cards.

Phalanx Commander — When Royal Warden enters the battlefield, create two tapped 2/2 black Necron Warrior artifact creature tokens.

Unearth (: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

Devoid (This card has no color.)

Search your library for a basic land card and reveal it. You may put that card onto the battlefield tapped if you control a land named Wastes. Otherwise, put that card into your hand. Then shuffle.

Each player can't cast more than one spell each turn.

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

Whenever Rulik Mons, Warren Chief attacks, look at the top card of your library. If it's a land card, you may put it onto the battlefield tapped. If you didn't put a card onto the battlefield this way, create a 1/1 red Goblin creature token.

: Surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)

The owner of target nonland permanent puts it on the top or bottom of their library.

Flash

When Runaway Boulder enters the battlefield, it deals 6 damage to target creature an opponent controls.

Cycling (, Discard this card: Draw a card.)

Starting intensity 1

Enchant land

Whenever enchanted land is tapped for mana, its controller adds an additional amount of equal to Runaway Growth's intensity, then perpetually increase its intensity by 1.

Trample

Runaway Trash-Bot gets +1/+0 for each artifact and/or enchantment card in your graveyard.

, : Runebound Wolf deals damage equal to the number of Wolves and Werewolves you control to target opponent.

When Runed Crown enters the battlefield, you may search your library, hand, and/or graveyard for a Rune card and put it onto the battlefield attached to Runed Crown. If you search your library this way, shuffle.

Equipped creature gets +1/+1.

Equip

Flying

When Runewing dies, draw a card.

Draw cards equal to the highest mana value among permanents you control.

Trample

At the beginning of your upkeep, you may put a +1/+1 counter on Rushwood Elemental.

, , Discard a card: Regenerate target creature.

When Ruthless Lawbringer enters the battlefield, you may sacrifice another creature. When you do, destroy target nonland permanent.