msem-instigator

At the beginning of each player's draw step, that player draws an additional card.
Spells cost {1} less to cast.
Players may spend mana as though it were mana of any color.

Civilization's Cost deals damage to each player equal to the number of nonbasic lands that player controls.
Flashback {R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

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.)
Tap four untapped creatures you control: Unlock Clockwork Astrolarium. If the revealed card is white, put it into your hand. Otherwise, put it on top of your library.

Flying
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
At the beginning of your end step, you may untap another target permanent.

{1}, Exile Coiling Mystic from your graveyard: Investigate. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)

Whenever a token creature you control dies, each opponent loses 2 life.

Target creature you control fights another target creature. (Each deals damage equal to its power to the other.)

Choose two —
• Destroy target artifact.
• Discard a card, then draw a card.
• Investigate. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)

Choose two —
• Create a 6/6 blue Kraken creature token.
• Take an extra turn after this one.
• End the turn.
Exile Crack in Time.

Journey three times. (Exile the top three cards of your library face up. Whenever a creature you control deals combat damage to an opponent, put a journeyed card you own into your hand.)

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.)
{1}, Discard two cards: Unlock Cryptic Fragment. If the revealed card is a basic land card, put it into your hand.

Escalate {2} (Pay this cost for each mode chosen beyond the first.)
Choose one or more —
• Counter target spell.
• Destroy target creature.
• Discard your hand, then draw two cards.

Enchant player
If enchanted player would shuffle their library, instead that player chooses a permanent they control and a card from their hand, shuffles them into their owner's libraries, then loses 3 life.

Exile up to six land cards from your graveyard. For each card exiled this way, create a 1/1 black Spirit creature token with flying.
Flashback {1}{B}{B}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Counter target spell with mana value 3 or less. If a spell is countered this way, return it to its owner's hand instead of putting it anywhere else.

At the beginning of each player's end step, that player sacrifices a permanent.

When Demonqueller Mage enters, gain control of target creature with power 2 or less until Demonqueller Mage leaves the battlefield.

When Detritus Scourge enters, you mill eight cards. Put a +1/+1 counter on Detritus Scourge for each creature card milled this way.

Menace
Sacrifice a creature: Devouring Flame gets +2/+0 until end of turn.

Choose one—
• Counter target spell.
• Exile two target permanents you control, then return them to the battlefield under your control.

Enchant creature
Enchanted creature can't attack or block.
Enchanted creature can't be the target of spells or abilities your opponents control.

When Disciple of the Buried Glade leaves the battlefield, create a 3/3 green Elemental creature token.

Choose one —
• Dispersive Volley deals 1 damage to each of up to three target attacking or blocking creatures.
• Target player sacrifices an enchantment.

As long as your deck contains only red and colorless cards, your minimum deck size is reduced by eight.

Whenever an artifact you control is put into a graveyard from the battlefield, create a 4/4 red Dragon creature token with flying.