Protection from red

First strike

Discard a card: Resilient Wanderer gains protection from the color of your choice until end of turn.

When Resistance Squad enters the battlefield, if you control another Human, draw a card.

Flash

When Resolute Reinforcements enters the battlefield, create a 1/1 white Soldier creature token.

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

Whenever you exert a creature, Resolute Survivors deals 1 damage to each opponent and you gain 1 life.

: Retrieval Agent gets +1/-1 until end of turn.

: Prevent the next 1 damage that would be dealt to Revered Elder this turn.

When Reverent Hunter enters the battlefield, put a number of +1/+1 counters on it equal to your devotion to green. (Each in the mana costs of permanents you control counts toward your devotion to green.)

Reyhan, Last of the Abzan enters the battlefield with three +1/+1 counters on it.

Whenever a creature you control dies or is put into the command zone, if it had one or more +1/+1 counters on it, you may put that many +1/+1 counters on target creature.

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

Partner with Timin, Youthful Geist (When this creature enters the battlefield, target player may put Timin into their hand from their library, then shuffle.)

Vigilance

Whenever a creature an opponent controls becomes tapped, if it isn't being declared as an attacker, put a +1/+1 counter on Rhoda, Geist Avenger.

You may play cards as though they were other cards of your choice with the same mana cost. You can't choose the same card twice. (Mana cost includes color.)

Whenever you cast an artifact spell, you may draw a card. If you do, discard a card.

Vigilance

As Riders of Gavony enters the battlefield, choose a creature type.

Human creatures you control have protection from creatures of the chosen type.

This spell costs less to cast for each Human you control.

Trample, haste

At the beginning of your end step, if Riders of the Mark attacked this turn, return it to its owner's hand. If you do, create a number of 1/1 white Human Soldier creature tokens equal to its toughness.

Protection from black; flanking <I>(Whenever a creature without flanking blocks this creature, the blocking creature gets -1/-1 until end of turn.)</I>

Suspend 3—

When the last time counter is removed from Riftmarked Knight while it's exiled, create a 2/2 black Knight creature token with flanking, protection from white, and haste.

Whenever you cast a modal spell, choose up to X, where X is the number of times you chose a mode for that spell —

• Exile the top card of your library. Until the end of your next turn, you may play it.

• Put a +1/+1 counter on Riku of Many Paths. It gains trample until end of turn.

• Create a 1/1 blue Bird creature token with flying.

Deathtouch

When Rilsa Rael, Kingpin enters the battlefield, you take the initiative.

Whenever you attack, target attacking creature gains deathtouch until end of turn. If you've completed a dungeon, that creature also gets +5/+0 and gains first strike and menace until end of turn.

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

At the beginning of combat on your turn, create X tokens that are copies of another target creature you control, where X is one plus the number of instant and sorcery spells you've cast this turn. They gain haste. Exile them at the beginning of the next end step.

Haste

, Sacrifice Riptide Chronologist: Untap all creatures of the creature type of your choice.

Whenever Riptide Entrancer deals combat damage to a player, you may sacrifice it. If you do, gain control of target creature that player controls. (This effect lasts indefinitely.)

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

Flying

Rishadan Airship can block only creatures with flying.

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

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

Coven — At the beginning of combat on your turn, if you control three or more creatures with different powers, Ritual Guardian gains lifelink until end of turn.

Meet in Reverse — You draw cards from the bottom of your library rather than the top.

Spoilers — Whenever an opponent scries, surveils, or searches their library, put a +1/+1 counter on River Song. Then River Song deals damage to that player equal to its power.

: Target blocking creature gets -1/-1 until end of turn.

: Target player who lost life this turn loses 1 life.

Flying, trample

When Roalesk, Apex Hybrid enters the battlefield, 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.)

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.

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

When Rogue Refiner enters the battlefield, 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.

When Rona, Disciple of Gix enters the battlefield, you may exile target historic card from your graveyard. (Artifacts, legendaries, and Sagas are historic.)

You may cast spells from among cards exiled with Rona.

, : Exile the top card of your library.

Whenever you cast an instant or sorcery spell, each opponent loses 1 life.

You may cast Rona, Sheoldred's Faithful from your graveyard by discarding two cards in addition to paying its other costs.

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.

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.")

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.

When Rowan's Stalwarts enters the battlefield, you may search your library and/or graveyard for a card named Rowan, Fearless Sparkmage, reveal it, and put it into your hand. If you search your library this way, shuffle.

Flying

Roxi, Publicist to the Stars's power is equal to the number of permanents you control with an art sticker plus the number of cards in your graveyard with an art sticker.

When Roxi enters the battlefield, distribute up to two art stickers among one or two nonland permanents you own.

, Exile the top card of your library: You gain 1 life.

Reach

Whenever Rubblebelt Raiders attacks, put a +1/+1 counter on it for each attacking creature you control.

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 .

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.

When Rune-Brand Juggler enters the battlefield, suspect up to one target creature you control. (A suspected creature has menace and can't block.)

, Sacrifice a suspected creature: Target creature gets -5/-5 until end of turn.

, , Discard a card: Regenerate target creature.

Whenever you cycle or discard a card, you may pay . If you do, put a -1/-1 counter on target creature.

Whenever Ryan attacks, exile cards from the top of your library until you exile a nonland card. You may cast the exiled card without paying its mana cost if it's a spell with mana value less than or equal to Ryan's power. Put the exiled cards not cast this way on the bottom of your library in a random order.

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

Trample

Formidable — Whenever Sabertooth Outrider attacks, if creatures you control have total power 8 or greater, Sabertooth Outrider gains first strike until end of turn.