If an opponent cast a blue spell this turn, you may pay rather than pay this spell's mana cost.

Change the target of target spell with a single target.

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

Double strike <I>(This creature deals both first-strike and regular combat damage.)</I>

Deathtouch

When Rilsa Rael, Kingpin enters, 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.

Flying

: Tap target creature and put an ice counter on it. ( can be paid with one mana from a snow source.)

Creatures with ice counters on them don't untap during their controllers' untap steps.

All Cats you control are Dogs in addition to their other types.

All Dogs you control are Cats in addition to their other types.

Cats and Dogs you control have haste.

Reach

, Sacrifice a land: Draw a card.

Riphook Raider can't be blocked by creatures with power 2 or less.

Nightbound (If a player casts at least two spells during their own turn, it becomes day next turn.)

Flying

At the beginning of your upkeep, return an enchantment you control to its owner's hand.

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.)

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.

Whenever you cast an instant or sorcery spell, create a 5/5 red Dragon creature token with flying.

Flying, ward

Other Dragons you control have ward .

At the beginning of your end step, if a creature or planeswalker an opponent controlled was dealt excess damage this turn, create a 4/4 red Dragon creature token with flying.

Vigilance

When River Herald Guide 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.)

Put a +1/+1 counter on target creature and a +1/+1 counter on up to one target Merfolk.

Return target artifact, enchantment, or legendary card from your graveyard to your hand. (Then exile this card. You may cast the creature later from exile.)

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.

First strike, menace, trample

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

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.

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.

Rootbound Crag enters tapped unless you control a Mountain or a Forest.

: Add or .

First strike

Raid — At end of combat on your turn, if you attacked this turn, create a Junk token for each opponent you attacked. (It's an artifact with ", Sacrifice this artifact: Exile the top card of your library. You may play that card this turn. Activate only as a sorcery.")

Whenever you sacrifice a Junk, add .

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.)

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

: Add .

, : Add , , or .

Raid — At the beginning of your end step, if you attacked this turn, reveal the top card of your library and put that card into your hand. You lose life equal to the card's mana value.

Ruins of Oran-Rief enters tapped.

: Add . ( represents colorless mana.)

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

When Rune-Brand Juggler enters, 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.

Training (Whenever this creature attacks with another creature with greater power, put a +1/+1 counter on this creature.)

When Rural Recruit enters, create a 3/1 green Boar creature token.

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

Spree (Choose one or more additional costs.)

+ — Untap all creatures target player controls.

+ — Target creature gains double strike until end of turn.

Offspring (You may pay an additional as you cast this spell. If you do, when this creature enters, create a 1/1 token copy of it.)

This creature can't be blocked by creatures with power 2 or less.

Squad—Exile four cards from your graveyard. (As an additional cost to cast this spell, you may pay its squad cost any number of times. When this creature enters, create that many tokens that are copies of it.)

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

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

Search target player's library for up to three cards, exile them, then that player shuffles. If this spell was kicked, instead search that player's library for up to fifteen cards, exile them, then that player shuffles.

Whenever Saint Traft and Rem Karolus becomes tapped, create a 1/1 red Human creature token if this is the first time this ability has resolved this turn. If it's the second time, create a 1/1 blue Spirit creature token with flying. If it's the third time, create a 4/4 white Angel creature token with flying.

Whenever you cast a spell that has convoke, untap Saint Traft and Rem Karolus.

: You may put a land card from your hand onto the battlefield.

Prevent all damage that would be dealt to you this turn by a source of your choice. Whenever damage from a black or red source is prevented this way this turn, you gain that much life.

Bushido 2 (Whenever this creature blocks or becomes blocked, it gets +2/+2 until end of turn.)

Creatures you control have haste.

−1: Target creature gets +2/+1 and gains haste until end of turn. Scry 1.

: Tap target creature. This ability costs less to activate for each Shrine you control.

When Sand Strangler enters, if you control a Desert or there is a Desert card in your graveyard, you may have Sand Strangler deal 3 damage to target creature.

Flying

When Sandstone Oracle enters, choose an opponent. If that player has more cards in hand than you, draw cards equal to the difference.

, Sacrifice a creature: Destroy each creature with the same mana value as the sacrificed creature.

Flying

Whenever Sapphire Dragon attacks or blocks, scry 2.

When Saprazzan Bailiff enters, exile all artifact and enchantment cards from all graveyards.

When Saprazzan Bailiff leaves the battlefield, return all artifact and enchantment cards from all graveyards to their owners' hands.

Saprazzan Cove enters tapped.

: Put a storage counter on Saprazzan Cove.

, Remove any number of storage counters from Saprazzan Cove: Add for each storage counter removed this way.

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

Flying

When Saprazzan Raider becomes blocked, return it to its owner's hand.

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

Create two 1/1 green Saproling creature tokens. If this spell was kicked, create four of those tokens instead.

Whenever you cast a historic spell, investigate. This ability triggers only once each turn. (Artifacts, legendaries, and Sagas are historic. To investigate, create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

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