msem-instigator

Enchant creature
Enchanted creature gets +3/-3.

Raider's Den enters the battlefield tapped.
{T}: Add {R}.
{R}, {T}: Target creature you control gains menace until end of turn. Activate only as a sorcery and only if you control a red creature.

Rakkiri Archer gets +0/+1 and has reach as long as it's embattled. (A creature is embattled if it has a counter on it or has a permanent you control attached to it.)

When Rakkiri Aspirant enters the battlefield, if you control an embattled creature, exile the top card of your library. Until end of turn, you may play that card. (A creature is embattled if it has a counter on it or has a permanent you control attached to it.)

Haste
Whenever a player casts a spell, Rakkiri Dissident deals 1 damage to that player.

Rakkiri Initiate gets +0/+2 as long as it's embattled. (A creature is embattled if it has a counter on it or has a permanent you control attached to it.)

Rakkiri Pathblazer gets +2/-1 as long as it's embattled. (A creature is embattled if it has a counter on it or has a permanent you control attached to it.)

Rakkiri Piker has double strike as long as it's embattled. (A creature is embattled if it has a counter on it or has a permanent you control attached to it.)

Sacrifice a creature: Rapacious Demon gets +1/+1 and gains flying until end of turn. Activate only as a sorcery.

Whenever a creature you control dies, each opponent discards a card.
Revive {6}{B} ({6}{B}, Exile this card from your graveyard: Create a token that's a copy of it except it has no mana cost. Revive only as a sorcery.)

Whenever Ravaging Tyrant enters the battlefield or attacks, each opponent loses 3 life, discards a card, and sacrifices a creature or planeswalker.

Scry 2, then draw two cards. You lose 2 life.

Exile target instant or sorcery spell you control. Until end of turn, you may cast that card from exile without paying its mana cost. When you do, copy it. You may choose new targets for the copy.

Return target creature card from your graveyard to your hand.
Draw a card.

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.

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

This spell costs {2} less to cast as long as you've sacrificed an Idol this turn.

Whenever an opponent casts a spell during your turn, create a token that's a copy of Resurging Rhino.

Target opponent chooses a creature card in your graveyard. Return the chosen card from your graveyard to your hand.

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

Reverent Flame deals 3 damage to target creature. Create three Idol tokens. (They're artifacts with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)

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

Counter target spell unless its controller pays {1}.
Metamorph {U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up and cast it at any time for its metamorph cost.)

Flying
When Rimecraft Owl enters the battlefield, 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.