msem-instigator

Enchant creature
When Ravage of Moments enters and at the beginning of your upkeep, put a -1/-1 counter on enchanted creature.

Death knell — You may sacrifice a nontoken creature. If you do, create a 3/3 black Spirit creature token. (As a creature you control dies, trigger one death knell of that creature or another permanent you control.)
Creatures you control dying causes their death knell to trigger. (In addition to the normal death knell trigger.)

You may have Reaping Willow assign its combat damage as though it weren't blocked.
{2}{G}: Reaping Willow gains indestructible until end of turn.

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.)

Exile the top three cards of your library. Until the end of your next turn, you may cast nonland cards exiled this way.
{3}{U}{R}: Return Reckless Experiment from your graveyard to the
battlefield tapped and transformed.

Flash

Flash
{1}, {T}: Scry 1.

When Renatured Vines enters, draw a card and create a Vial token. (It's an artifact with “{1}, Sacrifice this and another permanent: Draw a card. Activate only during your turn.”)
Renatured Vines power and toughness are each equal to the number of cards in your hand.

Whenever a creature enters, each opponent loses 1 life.

Tap up to two target creatures.
Draw a card.

Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)

Enchant creature
As long as enchanted creature has toughness 3 or less, it can't attack or block.

{U}, {T}: You may tap or untap another target creature.
Whenever one or more other creatures you control deal combat damage to a player, you may untap Riverchase Diver.

Choose one —
• Return target instant or sorcery card from your graveyard to your hand.
• Return target exiled card with agonize you own to your hand.
Exile Romantic Recollections.

Flash
Flying
Romantic Wisp can block only creatures with flying.

Lifelink, haste
Equip abilities that target Rose of Sunspear cost {X} less to activate, where X is her power.

Rosegill Rover can't be blocked.
Whenever Rosegill Rover attacks, you may discard a card. If you do, draw a card.

Enchant creature
{X}{B}: Enchanted creature gets +X/+X until end of turn.
When enchanted creature dies, return it to the battlefield under your control.

{T}, Pay 1 life: Add {C}.
Unveil {3}{B}{G} ({3}{B}{G}: Transform this. Unveil only as a sorcery.)

First strike
Prevent all noncombat damage that would be dealt to Royal Knight.

Royster Hounds can't be blocked by creatures with power 2 or less.

Whenever you make first contact, Runic Enforcer gains lifelink until end of turn. (You make first contact the first time each turn you cast a spell with a name not in your graveyard or control already.)

Target creature gets -3/-3 until end of turn. You gain 3 life.

Target creature you control fights target creature you don't control. (Then exile this card. You may cast the creature later from exile.)

Advance {1}{B} (Cast this for {1}{B} to advance it as it enters. {1}{B}: Advance this as a sorcery.)
Whenever Scarcrawler advances, you lose life equal to its power, then put a +1/+1 counter on it.