msem-instigator

Reach
Whenever you cast a spell with mana value 5 or greater, Reaper Squad deals 3 damage to target player or planeswalker.

Enchant creature
Enchanted creature has deathtouch and “When this creature dies, create a 2/2 black Demon creature token.”
{1}{B}, Exile Reaping Mask from your graveyard: Create a 2/2 black Demon creature token.

Reason Rots, Rage Remains deals X damage to any target.
Reconstruct {X}{R}{R} (You may cast this from your graveyard for its reconstruct cost reduced by the mana value of a permanent you sacrifice as you cast it this way. Then exile this.)

This creature gets +1/+1 for each creature card in your graveyard.
{4}{R}, Sacrifice another creature: Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn. Activate only as a sorcery.

Gain control of target creature until end of turn. Untap that creature. It gains haste and defiance until end of turn. (Whenever that creature takes damage, if it survives and wasn't defiant, put a +1/+1 counter on it and it becomes defiant.)

(Activate each submodule once as a sorcery. When this enters, activate one submodule for free.)
{2}{B}: Reduce
You may sacrifice a nonland permanent. If you do, each opponent sacrifices a permanent that shares a type with it.
{2}{G}: Reuse
Return target permanent card from your graveyard to your hand.
{1}{B}{G}: Recycle
Rebirth Module gains “Once each turn, when you sacrifice a permanent, you may conjure a card named Data-Point into your hand.” (It's a sorcery that costs {2} with “Draw a card.”)

Exile the top card of your library and up to one target permanent card from your graveyard. You may play cards exiled this way until the end of your next turn.
You may play an additional land this turn.

Draw two cards. You may play an additional land this turn.
Coalesce {5}{G}{U} (You may cast this from your graveyard for {5}{G}{U}. If you do, it enters as a Horror creature after it resolves. Exile it if it would leave the battlefield or not resolve.)

Return target instant or sorcery card from your graveyard to your hand.
Draw a card.

As an additional cost to cast this spell, sacrifice a creature.
Return two target creature cards from your graveyard to your hand.

Tap up to three target lands. They don't untap during their controller's next untap step.
Agonize (You may cast this card from your graveyard by putting a -1/-1 counter on a creature you control in addition to paying its other costs. Then exile this card.)

{T}, Sacrifice a land: Untap up to three target lands.

Haste
Whenever Reckless Dunerider attacks, if it's enchanted or equipped, you may draw a card. If you do, discard a card.

Trample
When Reckless Exemplar attacks, if its power is greater than its base power, target creature an opponent controls can't block this turn.

Rhapsody {4}{R}{R} (Pay {4}{R}{R} to cast this as a 4/4, or as a sorcery to make it become a 4/4.)
When Reckless Guardian dies, create X 1/1 colorless Servo artifact creature tokens, where X is Reckless Guardian's power.

Exile the top two cards of your library. Until the end of your next turn, you may play those cards.

Haste
Whenever Reckless Pyremage becomes tapped, it deals 1 damage to each creature and each player.

Reckless Rage deals 4 damage to target creature you don't control and 2 damage to target creature you control.

Target creature gets +3/+0 and gains haste and winnow until end of turn. (Damage dealt to it also causes its controller to lose that much life.)

Return target artifact or enchantment card from a graveyard to its owner's hand. You get a glory counter. (You lose glory counters before life. A player with ten or more glory counters wins the game.)

Tithe (As you cast this spell, you may tap three artifacts and/or creatures you control.)
Return target creature or planeswalker card from your graveyard to your hand. If this spell's tithe was paid, return that card to the battlefield instead.

Return up to three target land cards from your graveyard to your hand.
Coalesce {6}{G} (You may cast this from your graveyard for {6}{G}. If you do, it enters as a Horror creature after it resolves. Exile it if it would leave the battlefield or not resolve.)

{2}{B}: Reclaimed Kalak gains indestructible until end of turn.
Revive {3}{W} ({3}{W}, 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.)

Put target artifact, enchantment, or card in a graveyard on the bottom of its owner's library.