msem-instigator

Destroy target artifact or enchantment. If you controlled that artifact or enchantment, draw two cards.

{T}: Add {G}. If there are three or more creature cards in your graveyard, add {G}{G} instead.

Fortress Arena enters tapped.
{T}: Add {R} or {W}.
{2}{R}{W}, {T}, Sacrifice Fortress Arena: Draw a card.

You may cast this spell without paying its mana cost if it's the only card in your hand.
Counter target spell.

Choose target creature, then flip a coin. If you win the flip, Long Shot deals 5 damage to that creature. Otherwise, return Long Shot to its owner's hand.

Destroy target artifact or enchantment.

Target player loses X life and you gain X life, where X is the number of permanents you control with counters on them.

Harness (You may tap a creature you control as you cast this spell. If you do, reduce that spell's mana cost by that creature's power.)
When Darutu's Plow enters, if it was harnessed by an Ox, untap that Ox and attach Darutu's Plow to it.
Equipped creature gets +0/+2 and assigns combat damage equal to its toughness rather than its power.
Equip {3}

(As you complete a condition, decode it. After all are decoded, you solve the mystery and transform it.)
When Mystery of the Dying Herds enters, create a 0/2 white Ox creature token.
A creature you control dies.
You have 4 or more life than your starting life total.

Target creature +3/+3 and gains trample until end of turn.
Leitmotif (If you cast this spell from your hand, exile it as it resolves. When you next cast a spell that shares a color with this card, you may cast this from exile without paying its mana cost.)

Cast this spell only if creatures you control have a total power of 10 or greater or you control six or more lands.
Create two 6/6 green and white Elk creature tokens.

Reach, trample
When Anran, Root Steward enters, destroy up to three target noncreature permanents. For each permanent destroyed this way, its controller creates a colorless enchantment land token named Paradise with hexproof and “{T}: Add one mana of any color.”

As an additional cost to cast this spell, sacrifice a creature.
Surveil 2, then draw a card. Create a Treasure token and a 1/1 black Bat creature token with flying and “This creature can't block.”

Menace
Whenever Weoran enters or attacks, you may exile a creature card from your graveyard. If you do, draw a card. If that creature card had toughness 4 or greater, you gain 4 life.

When Twinforged Golem enters, create a 3/3 colorless Golem artifact creature token.

Whenever you cycle a card, reveal the top two cards of your library. You may put a permanent card from among them into your hand. Put the rest on top of your library in any order or into your graveyard.
Cycling {2} ({2}, Discard this card: Draw a card.)

The first instant or sorcery spell you cast each turn has convoke. (Each creature you tap while casting that spell pays for {1} or one mana of that creature's color.)

Whenever you cast your second spell each turn, you may tap target creature and put a stun counter on it.

Prismatic — Whenever you cast a multicolored spell, draw a card.

Melee (Whenever this creature attacks, it gets +1/+1 until end of turn for each opponent you attacked this combat.)
When Vaeldan's Liberator dies, you may exile it. If you do, return a permanent card with mana value less than or equal to Vaeldan's Liberator's power from your graveyard to your hand.

When Liturgy of Brine enters, draw a card, then you may put a land card from your hand onto the battlefield tapped.
Invocation — Whenever you spend four or more mana to cast a spell or activate an ability during your turn, Liturgy of Brine becomes a 5/5 Kraken Horror creature in addition to its other types until end of turn.

This spell costs {1} less to cast for each creature that attacked this turn.
Violent Offensive deals 4 damage to any target.

Target creature you control gets +X/+0 until end of turn. It deals damage equal to its power to up to one target creature.

Spells your opponents cast cost {2} more to cast for each card with the same name as that spell in that player's graveyard and for each nonland permanent on the battlefield with the same name as that spell.