Rimrock Knight can't block.

Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

, : Tap target artifact, creature, or land.

Equipped creature has trample. (It can deal excess combat damage to the player or planeswalker it's attacking.)

At the beginning of your upkeep, put a +1/+1 counter on equipped creature if it's green.

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

, : Discard a card at random, then draw two cards.

Equipped creature has vigilance. (Attacking doesn't cause it to tap.)

At the beginning of your upkeep, put a +1/+1 counter on equipped creature if it's white.

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

: Regenerate equipped creature. (The next time that creature would be destroyed this turn, it isn't. Instead tap it, remove all damage from it, and remove it from combat.)

At the beginning of your upkeep, put a +1/+1 counter on equipped creature if it's black.

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

Whenever you activate an ability, if it isn't a mana ability, you may pay . If you do, copy that ability. You may choose new targets for the copy.

Flying

When Ringskipper dies, clash with an opponent. If you win, return Ringskipper to its owner's hand. (Each clashing player reveals the top card of their library, then puts that card on the top or bottom. A player wins if their card had a higher mana value.)

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.

Whenever Riot Ringleader attacks, Human creatures you control get +1/+0 until end of turn.

Protection from Beasts

Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

: Change Riptide Mangler's base power to target creature's power. <I>(This effect lasts indefinitely.)</I>

Put target creature card from a graveyard onto the battlefield under your control. That creature is a black Zombie in addition to its other colors and types.

When Rise of the Hobgoblins enters the battlefield, you may pay . If you do, create X 1/1 red and white Goblin Soldier creature tokens.

: Red creatures and white creatures you control gain first strike until end of turn.

Choose one or both —

• Return target creature card from your graveyard to the battlefield.

• Return target Aura card from your graveyard to the battlefield.

Flying

When Rishadan Brigand enters the battlefield, each opponent sacrifices a permanent unless they pay .

Rishadan Brigand can block only creatures with flying.

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

Awaken 3— (If you cast this spell for , also put three +1/+1 counters on target land you control and it becomes a 0/0 Elemental creature with haste. It's still a land.)

Whenever another creature or planeswalker you control dies, put a +1/+1 counter on Rising Populace.

Whenever a creature you control is dealt damage, put a +1/+1 counter on it. (It must survive the damage to get the counter.)

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.

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

When Rith's Grove enters the battlefield, sacrifice it unless you return a non-Lair land you control to its owner's hand.

: Add , , or .

Vigilance

When River Herald Guide enters the battlefield, 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.)

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.

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.)

When Riveting Rigger enters the battlefield, 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.)

: Add .

, : Each player discards a card. Activate only as a sorcery.

Ward

As Roaming Throne enters the battlefield, choose a creature type.

Roaming Throne is the chosen type in addition to its other types.

If a triggered ability of another creature you control of the chosen type triggers, it triggers an additional time.

Landfall — Whenever a land enters the battlefield under your control, put a +1/+1 counter on target creature or Vehicle you control.

Channel — , Discard Roaring Earth: Put X +1/+1 counters on target land you control. It becomes a 0/0 green Spirit creature with haste. It's still a land.

Whenever Roaring Slagwurm attacks, tap all artifacts.

Whenever equipped creature deals combat damage to a player, you draw that many cards.

Equip

Equip Shaman, Warlock, or Wizard

Defender (This creature can't attack.)

When Roc Egg dies, create a 3/3 white Bird creature token with flying.

Flying

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.))

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.

First strike, menace, trample

Partner (You can have two commanders if both have partner.)

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

When Rogue Refiner enters the battlefield, draw a card and you get (two energy counters).

For each color, return up to one target creature card of that color from your graveyard to your hand.

: Add .

, : Target creature can't be blocked this turn.

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.

Roiling Horror's power and toughness are each equal to your life total minus the life total of an opponent with the most life.

Suspend X—. X can't be 0. (Rather than cast this card from your hand, you may pay and exile it with X 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. It has haste.)

Whenever a time counter is removed from Roiling Horror while it's exiled, target player loses 1 life and you gain 1 life.

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.

Return up to two target creatures your opponents control to their owners' hands. Target player draws two cards.

Rolling Earthquake deals X damage to each creature without horsemanship and each player.

Wall creatures can attack as though they didn't have defender.

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

: Roofstalker Wight gains flying until end of turn.

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

Destroy target noncreature permanent. If you control a Treefolk, draw a card.