msem-instigator

Flying, haste
When Cataclysmic Skytyrant enters, sacrifice all other non-Dragon creatures you control. For each creature sacrificed this way, create a 3/3 red Dragon creature token with flying.

You gain 5 life. Investigate. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)
Flashback {2}{G} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Lifelink (Damage dealt by this creature also causes you to gain that much life.)
{1}{B}: You gain 1 life.

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.

Trample
Chained Ravager can't attack or block unless a player has lost life this turn.

Whenever you cast a spell during an opponent's turn, put a +1/+1 counter on Champion of the Fae.

Menace
Creatures you control with mana value 1 get +2/+0 and have menace.

Tap an untapped creature you control: Put a charge counter on Channel the Spirits.
Remove nine charge counters from Channel the Spirits and sacrifice it: Creatures you control get +3/+3 and gain trample until end of turn. Activate only as a sorcery.

As an additional cost to cast this spell, discard a card.
Create three 1/1 black Spirit creature tokens with flying.

When Chroma's Guidance enters, create a 2/2 green Wolf creature token.
Whenever you create a creature token, put a +1/+1 counter on it.

During your opponents' turns, Chroma, the Faerie Circle has all basic land types in all zones.
Chroma, the Faerie Circle enters tapped.

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.)

You may pay {W}{U}{B}{R}{G} rather than pay this spell's mana cost.
Flying, first strike, vigilance, trample, lifelink

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

Equipped creature gets +2/+0 and has flying.
Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)

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.

Dancing Flames deals 2 damage to target creature.
Kindle 2—{3}{R} ({3}{R}, Exile this card from your graveyard: Create two 1/1 colorless Elemental creature tokens. Kindle only as a sorcery.)

Identity — When Danuri Warcaller enters, if you control at least two other creatures that share a creature type with it, create a 1/1 white Soldier creature token.

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.)

Indestructible (Damage and effects that say “destroy” don't destroy this creature.)
Whenever Declare, the Mother Bear deals combat damage to a player, put a +1/+1 counter on 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.