Creatures named Lightning Rager can't attack you or planeswalkers you control.

At the beginning of each player's upkeep, that player creates a 5/1 red Elemental creature token named Lightning Rager. It has trample, haste, and "At the beginning of the end step, sacrifice this creature."

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.

Discard any number of cards at random. Creatures you control get +1/+0 until end of turn for each card discarded this way.

Discard any number of cards. Counter target spell unless its controller pays for each card discarded this way.

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.

, Sacrifice Rith's Attendant: Add .

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 .

Creatures you control get +1/+1 until end of turn.

Coven — If you control three or more creatures with different powers, creatures you control get +2/+1 until end of turn instead.

Return target artifact card from your graveyard to your hand.

Enchant creature

When Ritual of Steel enters the battlefield, draw a card at the beginning of the next turn's upkeep.

Enchanted creature gets +0/+2.

As an additional cost to cast this spell, sacrifice a creature.

Gain control of target nonartifact, nonblack creature.

At the beginning of each player's upkeep, if that player controls more lands than each other player, Rivalry deals 2 damage to them.

Menace

: Add two mana in any combination of colors. Spend this mana only to cast Dragon creature spells.

Once during each of your turns, you may cast a Dragon creature spell from your graveyard.

Whenever you cast a Dragon creature spell from your graveyard, it gains "When this creature dies, exile it."

Rivendell enters the battlefield tapped unless you control a legendary creature.

: Add .

, : Scry 2. Activate only if you control a legendary creature.

Islandwalk (This creature can't be blocked as long as defending player controls an Island.)

: Regenerate River Boa.

River Delta doesn't untap during your untap step if it has a depletion counter on it.

At the beginning of your upkeep, remove a depletion counter from River Delta.

: Add or . Put a depletion counter on River Delta.

When River Herald Scout 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.)

Flying

: You gain 2 life and draw a card.

Whenever River Kelpie or another permanent enters the battlefield 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 enters the battlefield under your control, 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 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.)

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

Flying, trample

When RMS Titanic deals combat damage to a player, sacrifice it and create that many Treasure tokens.

Crew 3 (Tap any number of creatures you control with total power 3 or more: This Vehicle becomes an artifact creature until end of turn.)

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 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.)

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.

If you control a Forest, each blocked creature gets +2/+2 until end of turn.

Splice onto Arcane—An opponent gains 5 life. (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)

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.)

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

Roast deals 5 damage to target creature without flying.

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 the battlefield 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

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

When Robobrain War Mind enters the battlefield, 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.

Flying

Whenever Roc Charger attacks, target attacking creature without flying gains flying until end of turn.

Roc Hatchling enters the battlefield 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.

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.")