Starting intensity 1

Enchant land

Whenever enchanted land is tapped for mana, its controller adds an additional amount of equal to Runaway Growth's intensity, then perpetually increase its intensity by 1.

Trample

Runaway Trash-Bot gets +1/+0 for each artifact and/or enchantment card in your graveyard.

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."

: The next time a black source of your choice would deal damage to you this turn, prevent that damage.

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

Enchant permanent

When Rune of Sustenance enters, draw a card.

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

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

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.

As Runed Halo enters, choose a card name.

You have protection from the chosen card name. (You can't be targeted, dealt damage, or enchanted by anything with that name.)

If an opponent drew three or more cards this turn, you may pay rather than pay this spell's mana cost.

Runeflare Trap deals damage to target player equal to the number of cards in that player's hand.

Flying

When Rune-Scarred Demon enters, search your library for a card, put it into your hand, then shuffle.

Prevent all damage that would be dealt to creatures you control.

Enchant creature with power 3 or less

When Runner's Bane enters, tap enchanted creature.

Enchanted creature doesn't untap during its controller's untap step.

Vigilance, reach

Ruric Thar, the Unbowed attacks each combat if able.

Whenever a player casts a noncreature spell, Ruric Thar deals 6 damage to that player.

Creatures you control get +2/+1 until end of turn. Warrior creatures you control gain lifelink until end of turn. (Damage dealt by those Warriors also causes their controller to gain that much life.)

Draw two cards. Then discard a card at random unless you pay (two energy counters).

Warriors your team controls have haste.

Forestwalk (This creature can't be blocked as long as defending player controls a Forest.)

, , Discard a card: Regenerate target creature.

Flying

At the beginning of your upkeep, sacrifice an artifact other than Rust Elemental. If you can't, tap Rust Elemental and you lose 4 life.

Whenever Rust Scarab becomes blocked, you may destroy target artifact or enchantment defending player controls.

As Rustic Clachan enters, you may reveal a Kithkin card from your hand. If you don't, Rustic Clachan enters tapped.

: Add .

Reinforce 1— (, Discard this card: Put a +1/+1 counter on target creature.)

First strike

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

When Rustspore Ram enters, destroy target Equipment.

: Put an oil counter on Rustvine Cultivator.

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

Ruthless Cullblade gets +2/+1 as long as an opponent has 10 or less life.

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

Two target creatures each get -13/-13 until end of turn.

, Sacrifice a creature: Create two Treasure tokens. (They're artifacts with ", Sacrifice this artifact: Add one mana of any color.")

Sacrifice three Treasures: Draw a card.

Target opponent exiles a card from their hand. If this spell was cast from a graveyard, draw a card.

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

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.)

Whenever Ruxa, Patient Professor enters or attacks, return target creature card with no abilities from your graveyard to your hand.

Creatures you control with no abilities get +1/+1.

For each creature you control with no abilities, you may have that creature assign its combat damage as though it weren't blocked.

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.

, : Look at the top card of target player's library. If it has an Agents of S.N.E.A.K. watermark, you may reveal it and put it into your hand. Otherwise, put it on the top or bottom of its owner's library.

: Saberclaw Golem gains first strike until end of turn.

Whenever Sabertooth Cobra deals damage to a player, that player gets a poison counter. The player gets another poison counter at the beginning of their next upkeep unless they pay before that step. (A player with ten or more poison counters loses the game.)

Trample, protection from blue and from red

Flying, first strike

, : Sacellum Archers deals 2 damage to target attacking or blocking creature.

Other Snake creatures you control get +0/+1.

Shamans you control have ": Add ."

Prevent the next 3 damage that would be dealt to target creature this turn. At the beginning of the next end step, put a +0/+1 counter on that creature for each 1 damage prevented this way.

Return up to two target cards with cycling from your graveyard to your hand.

(: Add or .)

As Sacred Foundry enters, you may pay 2 life. If you don't, it enters tapped.

, Sacrifice Sacred Guide: Reveal cards from the top of your library until you reveal a white card. Put that card into your hand and exile all other cards revealed this way.

At the beginning of your upkeep, sacrifice Sacred Mesa unless you sacrifice a Pegasus.

: Create a 1/1 white Pegasus creature token with flying.

(: Add or .)

Sacred Peaks enters tapped.

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

Hexproof (This creature can't be the target of spells or abilities your opponents control.)

A person outside the game chooses an attacking or blocking creature target opponent controls. That player sacrifices that creature.

When Saddleback Lagac enters, support 2. (Put a +1/+1 counter on each of up to two other target creatures.)

When Sadistic Augermage dies, each player puts a card from their hand on top of their library.

Sacrifice a creature: Target player discards two cards. Activate only as a sorcery.