msem-instigator

Return any number of target creature cards with total mana value X or less from your graveyard to the battlefield, where X is the number of cards in your graveyard. Exile Battle at the Boneyard.

Vigilance
The first instant or sorcery spell you cast each turn has conspire. (As you cast that spell, you may tap two untapped creatures you control that share a color with it. When you do, copy it and you may choose a new target for the copy.)

When Woodcutter's Hatchet enters, search your library for a basic land card, reveal it, put it into your hand, then shuffle.
Equipped creature gets +2/+2.
Equip {2}

Choose one —
• Destroy target artifact or enchantment.
• Target creature you control deals damage equal to its power to another target creature.

Discard your hand, then draw three cards.
Mindstorm's Eye deals 3 damage to any target.

Put target permanent card from a graveyard onto the battlefield under your control.

Whenever Orphan Prodigy is dealt damage, it deals that much damage to target player.
Attain {4}{R} ({4}{R}: Transform this. Spend at least three colors of mana to activate this, and only as a sorcery.)

Foretell {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.)
Target creature gets -4/-0 until end of turn.
Draw a card.

Overkill deals 4 damage to any target that was dealt damage this turn.

{1}{G}: Night's Guard gets +2/+2 until end of turn. Activate only once each turn.

{T}: Add {C}.
{1}, {T}: Draw a card, then discard a card. Activate only if seven or more cards are in your graveyard.

This spell costs {2} less to cast if you've cast another spell this turn.
Enchant creature
When Tire Out enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.

{3}, {T}: Glimmering Staff deals 1 damage to any target.
{5}, {T}: Put a -1/-1 counter on target creature.

Interan Soothsayer gets +1/+1 for each other green creature you control.
{G}, {T}: Put a +1/+1 counter on target green creature.

Look at the top four cards of your library. Put any number of them into your graveyard and the rest on top of your library in any order.
You draw two cards and you lose 2 life.

Whenever Witchfinder Artur enters or attacks, each opponent mills two cards and loses 2 life.
Whenever you cast an instant or sorcery spell, you may exile target instant or sorcery card with mana value less than that spell's mana value from an opponent's graveyard. If you do, cast a copy of the exiled card without paying its mana cost.

Exile target permanent. Return that card to the battlefield under its owner's control at the beginning of the next end step.

You may play basic land cards you own from outside the game.

Target creature you control gets +X/+X until end of turn, where X is the number of +1/+1 counters among creatures you control.

Whenever an Aura you control becomes attached to a creature, choose one —
• Raiding Gnoll-Band deals 3 damage to that creature.
• That creature gets +3/+0 until end of turn.

Haste
When Inciting Bard enters, other creatures you control get +1/+0 and gain haste until end of turn.

(Transform this if it's not attached to a creature. Pay {3}{U} as a sorcery to unattach it.)
Enchant creature you control
Gamhaugen Warbeast's rider gets +2/+2 and has flying.

Trample
Whenever Silver-Dawn Ranger becomes the target of a spell, put a +1/+1 counter on each Warrior you control.

Whenever Veiled Charmer attacks, target creature blocks it this turn if able.

Counter target spell.
Look at the top three cards of your library. Put one on top and the rest on the bottom in any order.