Enchant creature (Target a creature as you cast this. This card enters attached to that creature.)

Enchanted creature has shroud. (It can't be the target of spells or abilities.)

Robobrain War Mind's power is equal to the number of cards in your hand.

When Robobrain War Mind enters, you get an amount of (energy counters) equal to the number of artifact creatures you control.

Whenever Robobrain War Mind attacks, you may pay . If you do, draw a card.

Roc Hatchling enters with four shell counters on it.

At the beginning of your upkeep, remove a shell counter from Roc Hatchling.

As long as Roc Hatchling has no shell counters on it, it gets +3/+2 and has flying.

When Rocco, Cabaretti Caterer enters, if you cast it, you may search your library for a creature card with mana value X or less, put it onto the battlefield, then shuffle.

Rock Slide deals X damage divided as you choose among any number of target attacking or blocking creatures without flying.

Rockslide Ambush deals damage to target creature equal to the number of Mountains you control.

Whenever you cast an instant, sorcery, or Wizard spell, Rockslide Sorcerer deals 1 damage to any target.

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

, , Sacrifice Rod of Absorption: You may cast any number of spells from among cards exiled with Rod of Absorption with total mana value X or less without paying their mana costs.

, : Rod of Spanking deals 1 damage to target player. Then untap Rod of Spanking unless that player says "Thank you, sir. May I have another?"

: Add for each Forest you control.

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

You may exert Rohirrim Chargers as it attacks. (It won't untap during your next untap step.)

Whenever you exert a creature, reveal cards from the top of your library until you reveal an Equipment card. Put that card onto the battlefield attached to that creature, then put the rest on the bottom of your library in a random order.

Landfall — Whenever a land you control enters, you get (an energy counter).

, Pay six : Draw three cards.

Kicker (You may pay an additional as you cast this spell.)

Roil Eruption deals 3 damage to any target. If this spell was kicked, it deals 5 damage instead.

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.

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

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

Destroy target land. If was spent to cast this spell, all creatures get -1/-1 until end of turn.

Rolling Temblor deals 2 damage to each creature without flying.

Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Vigilance

, : Create a tapped token that's a copy of target token that entered this turn.

Doctor's companion (You can have two commanders if the other is the Doctor.)

Whenever you cast a legendary spell, untap Rona, Herald of Invasion.

: Draw a card, then discard a card.

: Transform Rona. Activate only as a sorcery. ( can be paid with either or 2 life.)

Trample

Whenever a source deals damage to Rona, Tolarian Obliterator, that source's controller exiles a card from their hand at random. If it's a land card, you may put it onto the battlefield under your control. Otherwise, you may cast it without paying its mana cost.

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.

Equipped creature gets +2/+1.

Whenever a creature you control enters, attach Ronin Warclub to that creature.

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

: 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.

Vigilance, trample

, : Exile another target creature. Return that card to the battlefield under its owner's control at the beginning of the next end step.

This spell can't be countered.

Sliver spells can't be countered.

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

• Put two +1/+1 counters on target creature.

• Create a token that's a copy of target token you control.

• Target player creates a 1/1 green Squirrel creature token.

• Target opponent sacrifices a nontoken artifact of their choice.

, Return Rootha, Mercurial Artist to its owner's hand: Copy target instant or sorcery spell you control. You may choose new targets for the copy.

When Rooting Moloch enters, exile target card with a cycling ability from your graveyard. Until the end of your next turn, you may play that card.

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

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

As Roots of Life enters, choose Island or Swamp.

Whenever a land of the chosen type an opponent controls becomes tapped, you gain 1 life.

Sacrifice a Forest: Regenerate Rootwater Alligator.

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

: 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

When Rope Line Attendant enters the battlefield, creature cards in your hand perpetually gain "When this creature enters the battlefield, create a 1/1 green and white Citizen creature token."

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.")

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.

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

Face-down creatures you control have menace.

Whenever a permanent you control is turned face up, you draw a card and you lose 1 life.

When Rosie Cotton of South Lane enters, create a Food token. (It's an artifact with ", , Sacrifice this artifact: You gain 3 life.")

Whenever you create a token, put a +1/+1 counter on target creature you control other than Rosie.

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

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.

As an additional cost to cast this spell, you may sacrifice any number of nonland permanents. This spell costs less to cast for each permanent sacrificed this way.

Whenever Rottenmouth Viper enters or attacks, put a blight counter on it. Then for each blight counter on it, each opponent loses 4 life unless that player sacrifices a nonland permanent of their choice or discards a card.

Rotting Legion enters tapped.