mtg.wtf

As an additional cost to cast this spell, sacrifice a creature.
Gain control of target nonartifact, nonblack creature.

{T}: Add {B}.

Islandwalk
{G}: Regenerate River Boa.

Flying
{3}{G}{U}: You gain 2 life and draw a card.

{U}: River Merfolk gains mountainwalk until end of turn.

Enchant creature
Enchanted creature gets +1/+1.

{T}: Add {U}.

{B/G}: 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 {B}{R}

Flying
Whenever Roalesk, Prime Specimen or another permanent you control is turned face up, you may pay {X}. If you do, if X is 1 or more, conjure a duplicate of a random creature card with mana value X into your hand. Cloak it. It gains "{G/U}: Turn this creature face up" for as long as it remains face down.
Disguise {G}{U}

Create a 6/6 green Wurm creature token.
Flashback {3}{G}

Roast deals 5 damage to target creature without flying.

Whenever equipped creature deals combat damage to a player, you draw that many cards.
Equip {4}
Equip Shaman, Warlock, or Wizard {1}

Defender
When Roc Egg dies, create a 3/3 white Bird creature token with flying.

Flying

Rock Hydra enters the battlefield with X +1/+1 counters on it.
For each 1 damage that would be dealt to Rock Hydra, if it has a +1/+1 counter on it, remove a +1/+1 counter from it and prevent that 1 damage.
{R}: Prevent the next 1 damage that would be dealt to Rock Hydra this turn.
{R}{R}{R}: Put a +1/+1 counter on Rock Hydra. Activate only during your upkeep.

Rockfall Vale enters the battlefield tapped unless you control two or more other lands.
{T}: Add {R} or {G}.

Rockslide Ambush deals damage to target creature equal to the number of Mountains you control.

Whenever you cast an instant, sorcery, or Wizard spell, Rockslide Sorcerer deals 1 damage to any target.

Rocky Tar Pit enters the battlefield tapped.
{T}, Sacrifice Rocky Tar Pit: Search your library for a Swamp or Mountain card, put it onto the battlefield, then shuffle.

{T}: Add {G} for each Forest you control.

First strike, menace, trample
Partner

When Rogue Refiner enters the battlefield, draw a card and you get {E}{E}.

Flying
At the beginning of your upkeep, put a wage counter on Rogue Skycaptain. You may pay {2} for each wage counter on it. If you don't, remove all wage counters from Rogue Skycaptain and an opponent gains control of it.

At the beginning of your upkeep, you may pay {R}{R}{R}. If you don't, tap Rohgahh of Kher Keep and all creatures named Kobolds of Kher Keep, then an opponent gains control of them.
Creatures you control named Kobolds of Kher Keep get +2/+2.