Sacrifice a Forest: Regenerate Rootwater Alligator.

Flying, haste

Rotating Fireplace enters the battlefield tapped with a time counter on it.

: Add an amount of equal to the number of time counters on Rotating Fireplace.

, : Time travel. Activate only as a sorcery. (For each suspended card you own and each permanent you control with a time counter on it, you may add or remove a time counter.)

When Rotfeaster Maggot enters the battlefield, exile target creature card from a graveyard. You gain life equal to that card's toughness.

When Rottenheart Ghoul dies, target player discards a card.

Rotting Legion enters the battlefield tapped.

When Rotting Rats enters the battlefield, each player discards a card.

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.)

Rough deals 2 damage to each creature without flying.

Parley — Each player reveals the top card of their library. For each nonland card revealed this way, you create a 1/1 white Spirit creature token with flying. Then each player draws a card.

Add for each card in target opponent's hand. Until end of turn, you don't lose this mana as steps and phases end. Exile Rousing Refrain with three time counters on it.

Suspend 3— (Rather than cast this card from your hand, you may pay and exile it with three time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, you may cast it without paying its mana cost.)

Defender

: Roving Keep gets +2/+0 and gains trample until end of turn. It can attack this turn as though it didn't have defender.

First strike

As long as you control a Rowan planeswalker, Rowan's Battleguard gets +3/+0.

Destroy target land. Scry 2.

Whenever Rubblebelt Braggart attacks, if it's not suspected, you may suspect it. (A suspected creature has menace and can't block.)

Haste

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

: Add or .

All Hounds are Dogs. (We'll errata this to be true.)

First strike, lifelink

Underdog — If you've lost a game this match, CARDNAME and other Dogs you control get +1/+1.

Rugged Highlands enters the battlefield tapped.

When Rugged Highlands enters the battlefield, you gain 1 life.

: Add or .

, : Exile target land you control, then return it to the battlefield under your control.

Devoid (This card has no color.)

Ingest (Whenever this creature deals combat damage to a player, that player exiles the top card of their library.)

Other colorless creatures you control get +1/+0.

As Rukarumel, Biologist enters the battlefield, choose a creature type.

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

, : Create a 1/1 colorless Sliver creature token.

Whenever you cast a kicked spell, you may have Rumbling Aftershocks deal damage to any target equal to the number of times that spell was kicked.

At the beginning of your upkeep, you may put a verse counter on Rumbling Crescendo.

, Sacrifice Rumbling Crescendo: Destroy up to X target lands, where X is the number of verse counters on Rumbling Crescendo.

When Rumbling Ruin enters the battlefield, count the number of +1/+1 counters on creatures you control. Creatures your opponents control with power less than or equal to that number can't block this turn.

At the beginning of your upkeep, Rumbling Slum deals 1 damage to each player.

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

Put target artifact or creature on top of its owner's library.

Trample

When Runaway Carriage attacks or blocks, sacrifice it at end of combat.

Enchant permanent

When Rune of Flight enters the battlefield, draw a card.

As long as enchanted permanent is a creature, it has flying.

As long as enchanted permanent is an Equipment, it has "Equipped creature has flying."

: The next time a green source of your choice would deal damage to you this turn, prevent that damage.

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

Counter target spell unless its controller pays .

Draw a card.

When Runeforge Champion enters the battlefield, you may search your library and/or graveyard for a Rune card, reveal it, and put it into your hand. If you search your library this way, shuffle.

You may pay rather than pay the mana cost for Rune spells you cast.

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

When Rushing-Tide Zubera dies, if 4 or more damage was dealt to it this turn, draw three cards.

If an opponent controls an Island and you control a Forest, you may cast this spell without paying its mana cost.

Fading 5 <I>(This creature enters the battlefield with five fade counters on it. At the beginning of your upkeep, remove a fade counter from it. If you can't, sacrifice it.)</I>

Rusting Golem's power and toughness are each equal to the number of fade counters on it.

Whenever Rustmouth Ogre deals combat damage to a player, you may destroy target artifact that player controls.

Flying

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

Flying

When Ryusei, the Falling Star dies, it deals 5 damage to each creature without flying.

First strike

Other Snake creatures you control get +0/+1.

Shamans you control have ": Add ."

, Sacrifice Sacred Guide: Reveal cards from the top of your library until you reveal a white card. Put that card into your hand and exile all other cards revealed this way.

When Saddleback Lagac enters the battlefield, support 2. (Put a +1/+1 counter on each of up to two other target creatures.)

When Sadistic Augermage dies, each player puts a card from their hand on top of their library.

Prevent all damage that would be dealt to you and creatures you control this turn.

Search your library for a Forest or Plains card, reveal it, put it into your hand, then shuffle.

Sage of Ancient Lore's power and toughness are each equal to the number of cards in your hand.

When Sage of Ancient Lore enters the battlefield, draw a card.

At the beginning of each upkeep, if no spells were cast last turn, transform Sage of Ancient Lore.

When Sage of Epityr enters the battlefield, look at the top four cards of your library, then put them back in any order.

Heroic — Whenever you cast a spell that targets Sage of Hours, put a +1/+1 counter on it.

Remove all +1/+1 counters from Sage of Hours: For each five counters removed this way, take an extra turn after this one.