msem-instigator

{T}: Add one mana of any color. Activate only if you control a multicolored permanent or there is a multicolored card in your graveyard.

Ripping Wilds enters the battlefield tapped.
{T}: Add {C}.
{2}, {T}, Sacrifice Ripping Wilds: You may put up to two basic land cards from your hand onto the battlefield tapped.

Ripplecore Trails enters the battlefield tapped.
{T}: Add {R} or {G}.
{R}{G}, {T}, Sacrifice Ripplecore Trails: Conjure a card named Data-Point into your hand. (It's a sorcery that costs {2} with “Draw a card.”)

Rippling Core enters the battlefield tapped.
{T}: Add {R} or {W}.
{R}{W}, {T}, Sacrifice Rippling Core: Conjure a card named Data-Point into your hand. (It's a sorcery that costs {2} with “Draw a card.”)

At the beginning of your end step, aetherize target permanent you control. (To aetherize, create a token that's a copy of it, then exile that token.)

{T}: Add {C}.
{T}, Reappropriate: Add {W} or {U}. (Exile exactly two cards from your hand and/or graveyard.)

{T}: Add {C}.
{1}: Risti Workshop becomes a creature in addition to its other types until end of turn.
When Risti Workshop deals combat damage to an opponent, you may sacrifice it. If you do, search your library for a basic land card, put it onto the battlefield, then shuffle.

({T}: Add {U} or {R}.)
As Ritzy Parlor enters the battlefield, you may pay {1}. If you don't, Ritzy Parlor enters the battlefield tapped.

{T}, Pay 1 life: Add {W}.
{6}{W}{W}{W}, Exile Rius, Temple of the Grandfather from your hand: Target player gains 20 life.

Riv's Safehouse enters the battlefield tapped.
When Riv's Safehouse enters the battlefield, you may mill two cards.
{T}: Add {U} or {B}.

({T}: Add {U} or {R}.)
Roaring Cascade enters the battlefield tapped.

Discard Robocamel: Create a Food token. Activate only as a sorcery. (It's an artifact with “{2}, {T}, Sacrifice this artifact: You gain 3 life.”)

{T}: Add {C}.
{4}, {T}: Target creature can't be blocked this turn.

Whenever Rolling Homestead becomes a creature, nourish 1. (To nourish 1, either put a +1/+1 counter on this creature or create a 1/1 white Citizen creature token.)
Crew 2 (Tap any number of creatures you control with total power 2 or greater: This Vehicle becomes an artifact creature until end of turn.)

Rosesworn Knight gets +1/+1 as long as it's embattled. (A creature is embattled if it has a counter on it or a permanent you control attached to it.)

Rot-Sand Ruins enters the battlefield tapped unless you control another Desert.
{T}: Add {B} or {G}.

({T}: Add {R}.)
Rousing Rubble enters the battlefield tapped.
Double strike
{2}{R}{R}: Rousing Rubble becomes a creature in addition to its other types until end of turn.

{T}: Add {C}.
{2}, {T}: Add three mana of any one color.
{3}, {T}: Create a colorless artifact token named Lotus Petal with “{T}, Sacrifice this artifact: Add one mana of any color.”

{T}, Pay 1 life: Add {W} or {B}.
{2}, {T}, Sacrifice Royal Hospital and another permanent: Draw a card. Activate only during your turn.

({T}: Add {R}, {G}, or {W}.)
Rugged Dominion enters the battlefield tapped.

{T}: Add {C}.
{2}, {T}, Sacrifice Rugged Expanse: Put a +1/+1 counter on target creature. It gains vigilance until end of turn. Activate only as a sorcery.

({T}: Add {R} or {W}.)
Rugged Fields enters the battlefield tapped.
Cycling {2} ({2}, Discard this card: Draw a card.)

Rugged Highlands enters the battlefield tapped.
When Rugged Highlands enters the battlefield, you gain 1 life.
{T}: Add {R} or {G}.

As long as you control another artifact, Ruin Guardian gets +1/+1.

{4}, Sacrifice Ruin Salvager: Return target card from your graveyard to your hand.