msem-instigator

Choose one —
• Destroy target artifact.
• Add {R}{R}{R}.

Reach, trample
If a +1/+1 counter would be put on another creature you control, instead put a +1/+1 counter on that creature and on Avatar of the Natural.

When Dark Apprentice enters, mill three cards, then return a creature card from your graveyard to your hand.

Until end of turn, creatures you control get +1/+1 and creatures your opponents control get -1/-1.

Destroy target creature with flying.

Equipped creatures you control get +1/+1.
You may activate equip abilities any time you could cast an instant.
Equip {2}

Ward {2} (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays {2}.)
Each creature you control with a counter on it has ward {2}. (If a creature has multiple instances of ward, each triggers separately.)

Put a +1/+1 counter on each creature you control. If this spell was cast from a graveyard, those creatures gain flying until end of turn.
Flashback {5}{W}{W} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Enchant player
At the beginning of enchanted player's upkeep, that player upgrades a creature you control. (They give it one of the listed counters it doesn't have.)
• +1/+1
• Lifelink
• Menace

Calmed Battleground enters tapped unless you control a Plains.
{T}: Add {B} or {R}.

Vanguard — Whenever a creature you control attacks alone, it gets +1/+1 until end of turn.

When Marshcroaker Coaching enters, create three 1/1 blue Frog creature tokens.
Frogs you control have “{T}: Target creature gains flying until end of turn.”

Wu Xing (Add effects based on the number of colors of mana spent to cast this spell.)
1 | For each permanent type, return a card of that type from your graveyard to your hand. Exile Awaken Ancestry.
5 | Return an instant card and a sorcery card from your graveyard to your hand.

Angel spells you cast cost {1} less to cast.

When this creature enters, draw a card.

Whenever you draw your second card each turn, draw a card.

This spell costs {3} less to cast if a creature died this turn.
Put target creature card with mana value X from a graveyard onto the battlefield under your control.

When Saffrisa's Darkcaster enters, look at the top four cards of your library. You may substantiate a card from among them. Put the rest into your graveyard. (To substantiate a card, put it onto the battlefield face down as a 2/2 creature. You may turn it face up and cast it at any time for its mana cost if it isn't a creature.)

Target player discards a card.
Amass Soldiers 1. (Put a +1/+1 counter on an Army you control. It's also a Soldier. If you don't control one, create an 0/0 black Soldier Army creature token first.)

Flash
If a spell or ability would cause an opponent to create a token, instead you create that token and that player creates a 1/1 blue Fish creature token.

Flash
Whenever you make first contact, you may put a card you own from outside the game into your hand. (You make first contact the first time each turn you cast a spell with a name not in your graveyard or control already.)

Enchant creature
When Rising Tides enters, draw a card.
At the beginning of each upkeep, if enchanted creature is untapped, tap it.

{W}, Exile Foretold Cataclysm from your hand: Exile target creature you control until the end of your next turn. You may cast Foretold Cataclysm from exile during your next turn. Activate only as a sorcery.
Destroy all creatures.

Flying
Whenever another creature you control enters, you gain 1 life.

Destroy target creature. Investigate. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)