When River Herald Scout 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.)

Flying

: You gain 2 life and draw a card.

Whenever River Kelpie or another permanent enters from a graveyard, draw a card.

Whenever a player casts a spell from a graveyard, draw a card.

Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)

: Add . If you played a land this turn, add instead.

River Sneak can't be blocked.

Whenever another Merfolk you control enters, River Sneak gets +1/+1 until end of turn.

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.

: Add .

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.)

Flying

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

Whenever you sacrifice a creature, you may return target creature card with lesser mana value from your graveyard to the battlefield tapped. Do this only once each turn.

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

• You draw a card and you lose 1 life.

• Riveteers Confluence deals 1 damage to each creature and planeswalker you don't control.

• You may put a land card from your hand or graveyard onto the battlefield tapped.

: Riveteers Initiate gains deathtouch until end of turn.

Menace

When Riveteers Provocateur enters the battlefield, choose a creature card in your hand without blitz. It perpetually gains blitz. The blitz cost is equal to its mana cost.

Blitz (If you cast this spell for its blitz cost, it gains haste and "When this creature dies, draw a card." Sacrifice it at the beginning of the next end step.)

When Riveting Rigger enters, 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.)

Spectacle (You may cast this spell for its spectacle cost rather than its mana cost if an opponent lost life this turn.)

When Rix Maadi Reveler enters, discard a card, then draw a card. If Rix Maadi Reveler's spectacle cost was paid, instead discard your hand, then draw three cards.

Choose one —

• Return target permanent card from your graveyard to your hand.

• Put your commander into your hand from the command zone.

Entwine (Choose both if you pay the entwine cost.)

Flying, trample

When Roalesk, Apex Hybrid enters, 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.)

All creatures able to block target creature this turn do so.

Ferocious — That creature gains indestructible until end of turn if you control a creature with power 4 or greater.

Creature tokens you control have haste.

Whenever one or more creatures attack, you may pay . If you do, creatures attacking your opponents and/or planeswalkers they control get +2/+0 until end of turn.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after IV.)

I — Create two 3/3 green Dinosaur creature tokens.

II — Roar of the Fifth People gains "Creatures you control have ‘: Add , , or .'"

III — Search your library for a Dinosaur card, reveal it, put it into your hand, then shuffle.

IV — Dinosaurs you control gain double strike and trample until end of turn.

Create a 6/6 green Wurm creature token.

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

When you unlock this door, this Room deals damage equal to the number of cards in your hand to target creature an opponent controls.

(You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.)

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.)

Flying

Whenever Robber Fly becomes blocked, defending player discards all the cards in their hand, then draws that many cards.

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.)

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

At the beginning of your end step, each player exiles the top card of their library. Until your next end step, each player may play the card they exiled this way.

Whenever a player plays a land from exile or casts a spell from exile, you put a +1/+1 counter on target creature and create a Food token. (It's an artifact with ", , Sacrifice this artifact: You gain 3 life.")

You can't cast Rock Jockey if you've played a land this turn.

You can't play lands if you've cast Rock Jockey this turn.

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

: Rocket Launcher deals 1 damage to any target. Destroy Rocket Launcher at the beginning of the next end step. Activate only if you've controlled Rocket Launcher continuously since the beginning of your most recent turn.

: Add .

: Add . Spend this mana only to cast a creature spell.

, : Target Lizard, Mouse, Otter, or Raccoon you control gets +1/+0 and gains haste until end of turn. Activate only as a sorcery.

Double strike (This creature deals both first-strike and regular combat damage.)

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

First strike

Whenever another creature dies, you may put a +1/+1 counter on Rockslide Elemental.

Whenever you cast your first spell each turn, add .

: Add for each Forest you control.

(Gain the next level as a sorcery to add its ability.)

Whenever a creature you control deals combat damage to a player, exile the top card of that player's library face down. You may look at it for as long as it remains exiled.

: Level 2

//Level_2//

Creatures you control have menace.

: Level 3

//Level_3//

You may play cards exiled with Rogue Class, and you may spend mana as though it were mana of any color to cast those spells.

Whenever Rogue Kavu attacks alone, it gets +2/+0 until end of turn.

Flying

At the beginning of your upkeep, put a wage counter on Rogue Skycaptain. You may pay for each wage counter on it. If you don't, remove all wage counters from Rogue Skycaptain and an opponent gains control of it.

Whenever equipped creature deals combat damage to a player, you may draw a card.

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

At the beginning of your upkeep, you may pay . If you don't, tap Rohgahh of Kher Keep and all creatures named Kobolds of Kher Keep, then an opponent gains control of them.

Creatures you control named Kobolds of Kher Keep get +2/+2.

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.

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.

Visit — Creatures you control get +2/+0 until end of turn.

Lights — 2, 6

Visit — Creatures you control get +2/+0 until end of turn.

Lights — 4, 6