msem-instigator

Puzzlebox (Begin the game with this and another card you own from outside the game in the command zone, locked. That card is face down until you unlock this.)
{0}: If a player has fifteen or fewer cards in their library, unlock Dreamcast Relic. If the revealed card is blue, put it into your hand. Otherwise, put it on top of your library.

Whenever an Aura you control enters, draw a card.
You may cast Aura spells from your graveyard if that card wasn't put into your graveyard this turn.

Target creature gets +2/+0 until end of turn and can't be blocked except by three or more creatures this turn.
Flashback {U/R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Enchant creature
When Duelist's Wings enters, put two +1/+1 counters on enchanted creature.
Enchanted creature has flying.

Reach
Whenever Elemental of Vengeance is dealt damage, it deals damage equal to its power to any target.

Choose a card name, then look at the top card of your library. If it has the chosen name, you may exile it and you may play it from exile until end of turn.
Whenever a creature you control becomes tapped, you may return Enigma of Seventy Scrolls from your graveyard to your hand.

Hexproof
At the beginning of your upkeep, target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost.

Return any number of target nonland permanents with different mana values to their owners' hands. If seven or more permanents were returned this way, you may cast spells without paying their mana costs until end of turn.

When Establish Guard enters or leaves the battlefield, create a 1/1 white Human Soldier creature token and you gain 1 life.

{T}: Create an X/X green Elemental creature token, where X is Evoker of the Ancient Form's power.

When Exiled Necromancer enters, return target permanent card with mana value 1 or less from your graveyard to the battlefield.

Vigilance
Players can't untap more than two lands during their untap steps.

When Fae-Blessed Attendant enters, investigate. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)
Whenever you sacrifice a Clue, untap target permanent.

You may cast this spell as though it had flash if you pay an additional {1} to cast it.

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.

Flying
When Fickle Songstress enters, target opponent gains control of it.
Whenever you lose life, if you don't own Fickle Songstress, its owner gains control of it.

Field of Obelisks enters tapped.
As Field of Obelisks enters, choose a color other than white.
{T}: Add {W} or one mana of the chosen color.

This turn, players can't search libraries, bring cards from outside the game into game zones, or move cards that began the game face down in the command zone out of the command zone. (An unlocked puzzlebox cannot be unlocked again.)
Draw a card.

Finish the Job deals 5 damage to target creature that was dealt damage this turn. If that creature would die this turn, exile it instead.

You may have Flawless Counterfeit enter as a copy of any noncreature artifact on the battlefield.

Fleshcrawler gets +1/+0 for each player that has lost life this turn.

Put target creature with power X or less on top of its owner's library.
Investigate. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)

Target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost. (You may cast that card from your graveyard for its flashback cost. Then exile it. Mana cost includes color.)

At the beginning of your upkeep, mill a card.
Whenever you cast a spell from your graveyard, create a 2/2 green Wolf creature token.

{T}, Pay 2 life: Add {B}.
{T}: Add one mana of any color. Spend this mana only to cast spells from your graveyard or activate abilities of cards in your graveyard.