Rigging Runner

First strike
Raid — This creature enters with a +1/+1 counter on it if you attacked this turn.

Rile

Rile deals 1 damage to target creature you control. That creature gains trample until end of turn.
Draw a card.

Rowdy Crew

Trample
When this creature enters, draw three cards, then discard two cards at random. If two cards that share a card type are discarded this way, put two +1/+1 counters on this creature.

Inspiring Cleric

When this creature enters, you gain 4 life.

Rummaging Goblin

Star of Extinction

Destroy target land. Star of Extinction deals 20 damage to each creature and each planeswalker.

Storm Fleet Arsonist

Raid — When this creature enters, if you attacked this turn, target opponent sacrifices a permanent of their choice.

Storm Fleet Pyromancer

Raid — When this creature enters, if you attacked this turn, this creature deals 2 damage to any target.

Sun-Crowned Hunters

Enrage — Whenever this creature is dealt damage, it deals 3 damage to target opponent or planeswalker.

Sunbird's Invocation

Whenever you cast a spell from your hand, reveal the top X cards of your library, where X is that spell's mana value. You may cast a spell with mana value X or less from among cards revealed this way without paying its mana cost. Put the rest on the bottom of your library in a random order.

Sure Strike

Target creature gets +3/+0 and gains first strike until end of turn. (It deals combat damage before creatures without first strike.)

Swashbuckling

Enchant creature
Enchanted creature gets +2/+2 and has haste.

Thrash of Raptors

As long as you control another Dinosaur, this creature gets +2/+0 and has trample.

Tilonalli's Knight

Whenever this creature attacks, if you control a Dinosaur, this creature gets +1/+1 until end of turn.

Ixalan's Binding

When this enchantment enters, exile target nonland permanent an opponent controls until this enchantment leaves the battlefield.
Your opponents can't cast spells with the same name as the exiled card.

Tilonalli's Skinshifter

Haste
Whenever this creature attacks, it becomes a copy of another target nonlegendary attacking creature until end of turn.