Target creature you control gets +X/+X until end of turn. Then it fights up to one target creature you don't control.

: Add one mana of any color.

When Pursued Whale enters the battlefield, each opponent creates a 1/1 red Pirate creature token with "This creature can't block" and "Creatures you control attack each combat if able."
Spells your opponents cast that target Pursued Whale cost more to cast.

Whenever you cast a spell that's white, blue, black, or red, put a +1/+1 counter on Quirion Dryad.

As long as it's your turn, Radha, Heart of Keld has first strike.
You may look at the top card of your library any time, and you may play lands from the top of your library.
: Radha gets +X/+X until end of turn, where X is the number of lands you control.

When Radiant Fountain enters the battlefield, you gain 2 life.
: Add .

Draw three cards, then discard a card.

When Rambunctious Mutt enters the battlefield, destroy target artifact or enchantment an opponent controls.

Target creature you control gets +1/+1 and gains hexproof until end of turn. (It can't be the target of spells or abilities your opponents control.)

Choose one —
• Draw three cards.
• Return up to two target creatures to their owners' hands.

Choose one —
• Destroy target artifact.
• Destroy target enchantment.
• Exile target card from a graveyard.

You gain 3 life.
Draw a card.

Counter target spell. Untap up to four lands.

Whenever you cast a noncreature spell, you may have Riddleform become a 3/3 Sphinx creature with flying in addition to its other types until end of turn.
: Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)

Whenever you cast a Dog spell, create a 1/1 green Cat creature token.
Whenever you cast a Cat spell, create a 1/1 white Dog creature token.
, : Rin and Seri, Inseparable deals damage to any target equal to the number of Dogs you control. You gain life equal to the number of Cats you control.

Return target creature card from your graveyard to the battlefield.

Flying
When Roaming Ghostlight enters the battlefield, return up to one target non-Spirit creature to its owner's hand.

Until end of turn, target creature gets +0/+2 and another target creature gets -2/-0.

Enchant creature
When Rousing Read enters the battlefield, draw two cards, then discard a card.
Enchanted creature gets +1/+1 and has flying.

Rugged Highlands enters the battlefield tapped.
When Rugged Highlands enters the battlefield, you gain 1 life.
: Add or .