Flying

Whenever a source an opponent controls deals damage to you, you may put that many +1/+1 counters on Retaliator Griffin.

Spree (Choose one or more additional costs.)

+ — Copy target instant spell, sorcery spell, activated ability, or triggered ability. You may choose new targets for the copy.

+ — Change the target of target spell or ability with a single target.

Cumulative upkeep (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)

When Revered Unicorn leaves the battlefield, you gain life equal to the number of age counters on it.

Reveal the top three cards of your library and put one of them into your hand. You gain life equal to that card's mana value. Put all other cards revealed this way into your graveyard.

Unless any player pays , search your library for a card, put that card into your hand, then shuffle.

Battle cry (Whenever this creature attacks, each other attacking creature gets +1/+0 until end of turn.)

At the beginning of combat on your turn, the next time target creature would deal combat damage to one or more players this combat, prevent that damage. If damage is prevented this way, create that many 1/1 colorless Phyrexian Mite artifact creature tokens with toxic 1 and "This creature can't block."

Create a 2/2 white Knight creature token with vigilance. (Then exile this card. You may cast the creature later from exile.)

Target creature gets +2/+2 and gains horsemanship. (It can't be blocked except by creatures with horsemanship. This effect lasts indefinitely.)

Enchant creature

Enchanted creature gets +1/+1 for each card in its controller's hand.

At the beginning of the draw step of enchanted creature's controller, that player draws an additional card.

Trample

Whenever Rimehorn Aurochs attacks, it gets +1/+0 until end of turn for each other attacking Aurochs.

: Target creature blocks target creature this turn if able. ( can be paid with one mana from a snow source.)

, : Counter target instant or Aura spell that targets a permanent you control.

Enrage — Whenever Ripjaw Raptor is dealt damage, draw a card.

, : Draw a card for each Wizard you control.

As Riptide Replicator enters, choose a color and a creature type.

Riptide Replicator enters with X charge counters on it.

, : Create an X/X creature token of the chosen color and type, where X is the number of charge counters on Riptide Replicator.

Choose one or both —

• Return target creature card from your graveyard to the battlefield.

• Return target Aura card from your graveyard to the battlefield.

Target opponent may have Risk Factor deal 4 damage to them. If that player doesn't, you draw three cards.

Jump-start (You may cast this card from your graveyard by discarding a card in addition to paying its other costs. Then exile this card.)

Return target artifact card from your graveyard to your hand.

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 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.

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.

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.)

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

Return target creature or planeswalker you don't control to its owner's hand. If this spell was kicked, put that permanent on the bottom of its owner's library instead.

You may pay rather than pay the mana cost for Zombie creature spells you cast.

Sacrifice a Forest: Regenerate Rootwater Alligator.

Flying, haste

: Add one mana of any color.

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

Green creatures you control have trample.

When you cast this spell, you may put a card an opponent owns from exile into that player's graveyard. If you do, you gain 5 life.

Alliance — Whenever another creature you control enters, scry 1. If this is the second time this ability has resolved this turn, draw a card instead.

One or two target creatures each gain haste until end of turn. They can't be blocked this turn except by creatures with haste.

Escape—, Exile four other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.)

Enchant permanent

When Rune of Mortality enters, draw a card.

As long as enchanted permanent is a creature, it has deathtouch.

As long as enchanted permanent is an Equipment, it has "Equipped creature has deathtouch."

Instead of taking turns as normal, players take their phases sequentially. (For example, you take your beginning phase as the active player, then the next player in turn order becomes the active player and takes their beginning phase. After each player had a beginning phase, do the same for first main, combat phase, second main, ending phase, and then beginning phase again. If this creature leaves the battlefield, the active player continues their turn as normal.)

Flying

, Exile Runehorn Hellkite from your graveyard: Each player discards their hand, then draws seven cards.

First strike

Wither (This deals damage to creatures in the form of -1/-1 counters.)

: Put an oil counter on Rustvine Cultivator.

, Remove an oil counter from Rustvine Cultivator: Untap target land.

Whenever Rysorian Badger attacks and isn't blocked, you may exile up to two target creature cards from defending player's graveyard. If you do, you gain 1 life for each card exiled this way and Rysorian Badger assigns no combat damage this turn.

Menace

At the beginning of your end step, if you have the initiative, create a Treasure token. Create three of those tokens instead if you've completed a dungeon.

Choose a Background (You can have a Background as a second commander.)

When Sailor of Means enters, create a Treasure token. (It's an artifact with ", Sacrifice this artifact: Add one mana of any color.")

You may have Sakashima the Impostor enter as a copy of any creature on the battlefield, except its name is Sakashima the Impostor, it's legendary in addition to its other types, and it has ": Return this creature to its owner's hand at the beginning of the next end step."

Whenever Sample Collector attacks, you may collect evidence 3. When you do, put a +1/+1 counter on target creature you control. (To collect evidence 3, exile cards with total mana value 3 or greater from your graveyard.)

Flying

Whenever Sanctuary Raptor attacks, if you control three or more tokens, Sanctuary Raptor gets +2/+0 and gains first strike until end of turn.

First strike (This creature deals combat damage before creatures without first strike.)

: Sandstone Warrior gets +1/+0 until end of turn.

Megamorph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its megamorph cost and put a +1/+1 counter on it.)

When Sandstorm Salvager enters, create a 3/3 colorless Golem artifact creature token.

, : Put a +1/+1 counter on each creature token you control. They gain trample until end of turn.

When Sanguine Glorifier enters, put a +1/+1 counter on another target Vampire you control.

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

Indestructible

Whenever Sapling of Colfenor attacks, reveal the top card of your library. If it's a creature card, you gain life equal to that card's toughness, lose life equal to its power, then put it into your hand.

Sarkhan's Scorn deals damage equal to the number of turns you have begun to target creature or planeswalker.

Reveal your hand: If you have seven or more land cards in your hand, flip Sasaya, Orochi Ascendant.