Target creature gets +3/+3 until end of turn. Another target creature gets -3/-3 until end of turn.

Discard any number of cards. Search your library for up to that many basic land cards, reveal them, put them into your hand, then shuffle.

Flying

Whenever Rith, the Awakener deals combat damage to a player, you may pay . If you do, choose a color, then create a 1/1 green Saproling creature token for each permanent of that color.

Choose one —

• Destroy target nonbasic land.

• Create three 1/1 green Saproling creature tokens.

• Prevent all damage a source of your choice would deal this turn.

When you unlock this door, create a 6/6 black Demon creature token with flying.

(You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.)

Creatures you control get +1/+1 until end of turn.

Coven — If you control three or more creatures with different powers, creatures you control get +2/+1 until end of turn instead.

Return target artifact card from your graveyard to your hand.

Enchant creature

When Ritual of Steel enters, draw a card at the beginning of the next turn's upkeep.

Enchanted creature gets +0/+2.

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

Gain control of target nonartifact, nonblack creature.

At the beginning of each player's upkeep, if that player controls more lands than each other player, Rivalry deals 2 damage to them.

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."

Rivendell enters tapped unless you control a legendary creature.

: Add .

, : Scry 2. Activate only if you control a legendary creature.

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

: Regenerate River Boa.

River Delta doesn't untap during your untap step if it has a depletion counter on it.

At the beginning of your upkeep, remove a depletion counter from River Delta.

: Add or . Put a depletion counter on River Delta.

When River Herald Scout 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.)

Flying

: You gain 2 life and draw a card.

Whenever River Kelpie or another permanent enters from a graveyard, draw a card.

Whenever a player casts a spell from a graveyard, draw a card.

Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)

: Add . If you played a land this turn, add instead.

River Sneak can't be blocked.

Whenever another Merfolk you control enters, River Sneak gets +1/+1 until end of turn.

Imprint — Whenever a player casts an instant or sorcery spell from their hand, exile it instead of putting it into a graveyard as it resolves.

At the beginning of your upkeep, if there are four or more cards exiled with River Song's Diary, choose one of them at random. You may cast it without paying its mana cost.

: Add .

If was spent to cast this spell, return up to one target creature to its owner's hand. If was spent to cast this spell, target player reveals their hand, you choose a nonland card from it, then that player discards that card. (Do both if was spent.)

Flying

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

Whenever you sacrifice a creature, you may return target creature card with lesser mana value from your graveyard to the battlefield tapped. Do this only once each turn.

Choose three. You may choose the same mode more than once.

• You draw a card and you lose 1 life.

• Riveteers Confluence deals 1 damage to each creature and planeswalker you don't control.

• You may put a land card from your hand or graveyard onto the battlefield tapped.

: Riveteers Initiate gains deathtouch until end of turn.

Menace

When Riveteers Provocateur enters the battlefield, choose a creature card in your hand without blitz. It perpetually gains blitz. The blitz cost is equal to its mana cost.

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.)

When Riveting Rigger enters, you may sacrifice another artifact. If you do, put two +1/+1 counters on Riveting Rigger and it assembles a Contraption. (Put the top card of your Contraption deck face up onto one of your sprockets.)

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.

Flying, trample

When Roalesk, Apex Hybrid enters, put two +1/+1 counters on another target creature you control.

When Roalesk dies, proliferate, then proliferate again. (Choose any number of permanents and/or players, then give each another counter of each kind already there. Then do it again.)

When you unlock this door, this Room deals damage equal to the number of cards in your hand to target creature an opponent controls.

(You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.)

Whenever Roaring Slagwurm attacks, tap all artifacts.

Reach, haste

Whenever Robber of the Rich attacks, if defending player has more cards in hand than you, exile the top card of their library. During any turn you attacked with a Rogue, you may cast that card and you may spend mana as though it were mana of any color to cast that spell.

Flying, deathtouch, lifelink

Whenever you gain life, Rodolf Duskbringer gains indestructible until end of turn.

At the beginning of your end step, you may pay . When you do, return target creature card with mana value X or less from your graveyard to the battlefield, where X is the amount of life you gained this turn.

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

When Rohirrim Lancer dies, the Ring tempts you.

Roil's Retribution deals 5 damage divided as you choose among any number of target attacking or blocking creatures.

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

Whenever Ronin Cliffrider attacks, you may have it deal 1 damage to each creature defending player controls.

Lands you control and land cards in your library are basic.

: Gain control of target creature for as long as that creature is enchanted.

: Add one mana of any color.

Menace

Whenever Rotisserie Elemental deals combat damage to a player, put a skewer counter on Rotisserie Elemental. Then you may sacrifice it. If you do, exile the top X cards of your library, where X is the number of skewer counters on Rotisserie Elemental. You may play those cards this turn.

+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.

When Rubblebelt Maverick enters, surveil 2. (Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)

, Exile Rubblebelt Maverick from your graveyard: Put a +1/+1 counter on target creature. Activate only as a sorcery.

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 .

: Add .

, : Add , , or .

Menace

When Ruin Grinder dies, each player may discard their hand and draw seven cards.

Mountaincycling (, Discard this card: Search your library for a Mountain card, reveal it, put it into your hand, then shuffle.)

Ruins of Oran-Rief enters tapped.

: Add . ( represents colorless mana.)

: Put a +1/+1 counter on target colorless creature that entered this turn.

Flying

: Rune-Cervin Rider gets +1/+1 until end of turn.

Kicker—Sacrifice a land. (You may sacrifice a land in addition to any other costs as you cast this spell.)

Return target nonland permanent to its owner's hand. If this spell was kicked, return another target nonland permanent to its owner's hand.

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