msem-instigator

Redleather Armorer gets +1/+1 as long as it's your turn.

First strike
Whenever an opponent casts a noncreature spell, you gain 2 life.

At the beginning of your upkeep, return target enchantment card from your graveyard to your hand.
Whenever Reflect on Serenity or another enchantment you control enters or leaves the battlefield, each opponent loses 1 life and you gain 1 life.

Whenever another creature named Reminiscing Youth you control enters, you may discard a card. If you do, draw a card.

Destroy target creature or planeswalker. You gain 1 life and that permanent's controller loses 1 life.

Flying
When Reticent Possessor enters, you may attach target Aura you control to target permanent or player it could enchant.

Shuffle a card from your hand into your library, then draw two cards.

Flying
When Rimecraft Owl enters, you may put an Aura card with mana value 3 or less from your hand or graveyard onto the battlefield attached to Rimecraft Owl or target creature an opponent controls that Aura could enchant.

Flying
{U}: Ripclaw Drake gets +1/-1 until end of turn.

Look at the top five cards of your library. You may reveal a land or enchantment card from among them and put it into your hand. Then put the rest on the bottom of your library in any order.

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.)

When Rotfeeder Slime dies, you gain 2 life for each creature card in your graveyard.

{1}{B}, Exile a creature or land card from your graveyard: Return Rotwood Whisper from your graveyard to the battlefield tapped.

{T}: Add {C}.
{T}, Pay 1 life: Add {B} or {R}.

As an additional cost to cast this spell, put a card from your hand on the bottom of your library.
Draw two cards.

When Ruthless Conscript dies, arm up to two target creatures you control. (Create a colorless Equipment artifact token with “Equipped creature gets +1/+0” and equip {2}, then attach it to that creature.)

Whenever a creature dies, each opponent loses 1 life and you gain 1 life.
At the beginning of your end step, if you gained 4 or more life this turn, you may sacrifice Saffrisa's Touch. If you do, return target creature card from your graveyard to the battlefield.

Deathtouch
Instant and sorcery spells you control have deathtouch.
{2}{B}: Exile target creature card from an opponent's graveyard, then create a 2/2 black Zombie creature token and put a +1/+1 counter on Saffrisa, Heir Apparent.

Flying
{T}: Target attacking creature gets +1/+1 and gains flying until end of turn.

{2}{B}: Return Sanitarium Skeleton from your graveyard to your hand.

Enchant player
Whenever enchanted player taps a nonbasic land they control, that land doesn't untap during its controller's next untap step.

Scion of the Wild's power and toughness are each equal to the number of creatures you control.

Scornful Flames deals 4 damage to target player.
Dominance — Scornful Flames deals 1 damage to each creature that player controls if you control the creature with the greatest power or tied for the greatest power.

Scrollsnatcher can't block and can't be blocked.
Whenever Scrollsnatcher deals combat damage to a player, look at the top card of each library, then put any number of those cards into their owner's graveyards.

Lifelink
Other creatures you control enter with an additional +1/+1 counter on them.
{2}{G}{W}: Nourish 1. (To nourish 1, either put a +1/+1 counter on this creature or create a 1/1 white Citizen creature token.)