msem-instigator

Other nontoken creatures you control have “When this creature enters, nourish 1.” (To nourish 1, either put a +1/+1 counter on this creature or create a 1/1 white Citizen creature token.)
Whenever Cybele, Mertle's Apprentice or another creature you control becomes tapped, you gain life equal to that creature's toughness.

Draw a card.

Firehearth Halls enters tapped unless you control a basic Mountain.
{T}: Add {R}.
{R}{R}: Firehearth Halls becomes a 1/1 red Dwarf Warrior creature with double strike until end of turn. It's still a land.

Equipped creature gets +2/+2 and has protection from blue and from black. (It can't be targeted, dealt damage, enchanted, or equipped by anything blue or black.)
Whenever equipped creature deals combat damage to a player, Sword of Fanaticism deals 3 damage to up to one target creature and you gain 3 life.
Equip {R}{W}

Draw two cards, then discard two cards.
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.)

As Aparodist enters, choose a non-Human creature type.
Aparodist is the chosen type in addition to its other types.
{1}, {T}: Put a +1/+1 counter on each creature you control of the chosen type.

As an additional cost to cast this spell, reveal an instant card from your hand or pay {2}.
Counter target spell with mana value 4 or less.

Each player draws two cards.
Flashback—{W}, Tap two untapped white creatures you control. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Flash
Whenever this enchantment enters, draw a card.
Whenever you cast your first spell during each opponent's turn, draw a card.
Foretell {2}{U} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

Siphon (Each -1/-1 counter you put on your creatures up to their remaining toughness while casting this pays for {1}.)
Draw X cards, where X is the greatest power among creatures you control. Then you may put a permanent card with mana value X or less from your hand onto the battlefield.

Living weapon (When this Equipment enters, create a 0/0 black Phyrexian Germ creature token, then attach this to it.)
Equipped creature gets +1/-1.
Whenever equipped creature dies, draw a card. This ability triggers only once each turn.
Equip {1}

First strike (This creature deals combat damage before creatures without first strike.)
Whenever Cauldish Warmonger attacks, create a 1/1 white Soldier creature token that's tapped and attacking.

Whenever you cast a spell, Scorned Figurant gets +1/+1 until end of turn.

Target creature gains double strike until end of turn.

Exile target creature or planeswalker card from a graveyard. Search its controller's hand, graveyard, and library for any number of cards with the same name as that card and exile them. Then that player shuffles.

Flying
Whenever Wind Savant attacks, harmonize. (Trigger up to one harmony of a permanent you control.)
Harmony — Wind Savant gets +1/+1 until end of turn.

Flash
When Keeper of Codices enters, you may exile target artifact or enchantment you control. If you do, return that card to the battlefield under its owner's control at the beginning of the next end step.

Glitch—Discard a card. (Remove one [restriction] for each time you pay the glitch cost.)
Add {R} for each [Mountain] land you control, then exile the top three cards of your library. You may play [one of] those cards this turn.

Haste
When Inciter of Spirits Scorned enters, return target creature card with mana value 3 or less from your graveyard to the battlefield. It gains haste. Sacrifice it at the beginning of the next end step.

When Featherfall Ascetic enters, create a 1/1 white and blue Bird creature token with flying.
Whenever a nontoken Aura enters enchanting Featherfall Ascetic, for each other creature you control, you may create a token that's a copy of that Aura enchanting that creature.

Target player sacrifices a creature. Fateseal 1. (To fateseal 1, look at the top card of an opponent's library, then you may put it on the bottom of that player's library.)

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Whenever you cast a noncreature spell, each opponent loses life equal to Morose Harpist's power.

When Rotting Greatwurm dies, put three +1/+1 counters on target creature you control.
Fleeting {2}{G} (You may cast this spell for its fleeting cost. If you do, sacrifice it at the beginning of the next end step.)

Flash
When Cane Dancer enters, you may cast target blue instant or sorcery card with mana value 2 from your graveyard without paying its mana cost. If that spell would be put into your graveyard, exile it instead.

Target creature gets +2/+0 and gains haste until end of turn.
Flashback {1}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)