mtg.wtf

Cumulative upkeep {W}
Whenever a Swamp, Mountain, black permanent, or red permanent becomes tapped, Royal Decree deals 1 damage to that permanent's controller.

Whenever Royal Trooper blocks, it gets +2/+2 until end of turn.

Aftermath
Up to three target lands don't untap during their controller's next untap step.

Rubblehulk's power and toughness are each equal to the number of lands you control.
Bloodrush — {1}{R}{G}, Discard Rubblehulk: Target attacking creature gets +X/+X until end of turn, where X is the number of lands you control.

You may choose not to untap Rubinia Soulsinger during your untap step.
{T}: Gain control of target creature for as long as you control Rubinia and Rubinia remains tapped.

Landfall — Whenever a land enters the battlefield under your control, each opponent mills three cards.

Menace
When Ruin Grinder dies, each player may discard their hand and draw seven cards.
Mountaincycling {2}

Deathtouch
When Ruin Rat dies, exile target card from an opponent's graveyard.

When Ruination Rioter dies, you may have it deal damage to any target equal to the number of land cards in your graveyard.

{2}{R}, Sacrifice Ruinous Gremlin: Destroy target artifact.

Destroy target creature or planeswalker.
Awaken 4—{5}{B}{B}

Destroy all nonland permanents your opponents control.

Ruins of Trokair enters the battlefield tapped.
{T}: Add {W}.
{T}, Sacrifice Ruins of Trokair: Add {W}{W}.

When Rukh Egg dies, create a 4/4 red Bird creature token with flying at the beginning of the next end step.

Menace
Whenever Rulik Mons, Warren Chief enters the battlefield or attacks, look at the top card of your library. If it's a land card, you may put it onto the battlefield tapped. If you didn't put a card onto the battlefield this way, create a 1/1 red Goblin creature token.

At the beginning of your upkeep, Rumbling Slum Avatar deals 1 damage to each opponent.

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

Other Goblins you control get +1/+1.
Whenever Rundvelt Hordemaster or another Goblin you control dies, exile the top card of your library. If it's a Goblin creature card, you may cast that card until the end of your next turn.

As Runed Halo enters the battlefield, choose a card name.
You have protection from the chosen card name.

When Runeforge Champion enters the battlefield, you may search your library and/or graveyard for a Rune card, reveal it, and put it into your hand. If you search your library this way, shuffle.
You may pay {1} rather than pay the mana cost for Rune spells you cast.

Flying
{5}{R}, Exile Runehorn Hellkite from your graveyard: Each player discards their hand, then draws seven cards.

Sacrifice a creature. Rupture deals damage equal to that creature's power to each creature without flying and each player.

Rupture Spire enters the battlefield tapped.
When Rupture Spire enters the battlefield, sacrifice it unless you pay {1}.
{T}: Add one mana of any color.