msem-instigator

When Ravenous Rats enters the battlefield, target opponent discards a card.

Whenever another creature you control dies, target player loses 1 life and you gain 1 life.
{1}{B}, Sacrifice a creature: Scry 1. (To scry 1, look at the top card of your library. You may put that card on the bottom of your library.)

Draw a card for each creature you control with a permanent attached to it.

Put four time counters on target nonland permanent. If it doesn't have vanishing, it gains vanishing. (At the beginning of your upkeep, remove a time counter from that permanent. When the last is removed, sacrifice it.)

When Reclamation Sage enters the battlefield, you may destroy target artifact or enchantment.

Destroy target noncreature permanent. Its controller may search their library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Kicker {1}{U} (You may pay an additional {1}{U} as you cast this spell.)
Counter target creature spell. If this spell was kicked, create a 1/1 colorless Thopter artifact creature token with flying.

Each creature you control gets +1/+1 for each other creature you control with the same name.

Trample
{1}{B}: Rehis-Dorahn Plowbeast gets +1/+1 until end of turn.

Choose one—
• Put two -1/-1 counters on target creature.
• Untap target creature. It gains deathtouch until end of turn.
• Until end of turn, target creature deals damage to creatures in the form of -1/-1 counters.

Deathtouch

Rehison Soothemage has lifelink as long as you control another Elf.

If one or more -1/-1 counters would be put on a creature an opponent controls, put twice that many -1/-1 counters on it instead.

Trample, haste
When Rejuvenating Elemental enters the battlefield, remove up to X -1/-1 counters from among creatures you control. Rejuvenating Elemental gets +1/+1 until end of turn for each counter removed this way.

Kicker {U} (You may pay an additional {U} as you cast this spell.)
Counter target spell. If this spell was kicked, look at the top three cards of your library, then put them back in any order.

Flash (You may cast this spell any time you could cast an instant.)
When Replicator Mage enters the battlefield, you may create a token that's a copy of target creature that's attacking you. Exile that token at end of combat.

Until end of turn, target creature loses all abilities and has base power and toughness 1/1. Scry 1. (To scry 1, look at the top card of your library. You may put that card on the bottom of your library.)

Whenever another creature enters the battlefield under your control, you may change Reshaping Primordial's base power and toughness to that creature's power and toughness.

Creatures you control get +2/+1 until end of turn.
Cycling {1}{W} ({1}{W}, Discard this card: Draw a card.)

You may cast this spell as though it had flash if you pay an additional {2} to cast it.
You may have Resourceful Impersonator enter the battlefield as a copy of any creature on the battlefield.

Ripping Wilds enters the battlefield tapped.
{T}: Add {C}.
{2}, {T}, Sacrifice Ripping Wilds: You may put up to two basic land cards from your hand onto the battlefield tapped.

When Rise from Death enters the battlefield, exile all cards from your library. When Rise from Death is no longer on the battlefield, shuffle your graveyard into your library.
If you would draw a card, instead return a card from your graveyard to your hand. If you can't, you lose the game.
If a card would be put into your graveyard from anywhere, exile it instead.

Engorge (As this enters the battlefield, mill three cards, then exile a card from among the milled cards.)
When Risen Looter enters the battlefield, if it engorged a noncreature, nonland card, draw a card, then discard a card.

You can't draw cards.
{2}{R}: Exile the top card of your library. You may play it this turn.