msem-instigator

{1}, Sacrifice a creature: Put a +1/+1 counter on Chitterrax, then each opponent loses 1 life and you gain 1 life.

As Vanquisher's Banner enters, choose a creature type.
Creatures you control of the chosen type get +1/+1.
Whenever you cast a creature spell of the chosen type, draw a card.

Flash
If an opponent would draw a card, that player exiles the top card of their library instead. During each player's turn, that player may play that card for as long as it remains exiled.

Tap target creature. That creature doesn't untap during its controller's next untap step.

When United in Battle enters, look at the top six cards of your library. You may reveal a Dwarf or Elf card from among them and put it into your hand. Put the rest on the bottom in a random order.
Whenever a Dwarf or Elf you control enters, put a +1/+1 counter on it.

Equipped creature gets +1/+1.
Whenever equipped creature attacks, tap up to one target creature.
Equip {1}

Flash
Whenever Operative POSH attacks or you cast a green or red spell, exile up to one target nontoken permanent. Return that card to the battlefield under its owner's control at the beginning of the next end step.

Target opponent chooses a number, then you and that player may each search one of your libraries for a permanent card and reveal them. Put each permanent card with mana value less than or equal to the chosen number onto the battlefield under their owner's control, the rest into their owners' hands, then each player who searched their library this way shuffles it.

Prevent all damage target attacking creature would deal this turn. If there is a card named Warning Shot in your graveyard, exile that creature.

Target creature you control and each other creature with the same name as that creature get +3/+3 and gain trample until end of turn.

Enchant creature
Enchanted creature gets +2/+2.
When Seeking Horizons is put into your graveyard from anywhere other than your library, investigate. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)

Flying, haste
Ward—Pay 3 life.
The first Dragon spell you cast each turn costs {R}{R} less to cast. (This can reduce the amount of generic mana you pay.)

Transcend (Activate as a sorcery to gain the next type and a +1/+1 counter.)
Trample
{2}{R}: Demigod — Create a 2/1 black Spirit creature token with “This creature can't block.”
{5}{R}: God — Until end of turn, creatures you control get +1/+0 and gain haste and “When this creature dies, it deals 1 damage to any target.”

Reprise {3}{B} (As you cast an instant or sorcery spell, you may exile one card with reprise from your graveyard and pay its reprise cost. If you do, add its effects to that spell.)
This spell deals 2 damage to target creature. You gain life equal to the total damage dealt by this spell.

Whenever Cocky Delinquent is dealt damage, you gain that much life and Cocky Delinquent deals that much damage to up to one target creature or planeswalker you don't control.

As Game Trail enters, you may reveal a Mountain or Forest card from your hand. If you don't, Game Trail enters tapped.
{T}: Add {R} or {G}.

Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.)
{2}{R}, Sacrifice Prowling Beastmaster: It deals 2 damage to target player or planeswalker.

Flash
When Comforting Presence enters, return target spell with mana value 2 or less to its owner's hand.
Whenever an opponent casts their second spell each turn, draw a card.

At the beginning of each end step, if you drew and/or discarded six or more cards this turn, return Anemothrys, Reefcrown from your graveyard to the battlefield.
Cycling {R}{G} ({R}{G}, Discard this card: Draw a card.)

Rice Fields enters tapped.
{T}: Add {W} or {U}.
When Rice Fields enters, you may put a loyalty counter on a planeswalker you control.

Frozen Hinterlands enters tapped.
{T}: Add {W} or {U}.
{1}{W}{U}: Until end of turn, Frozen Hinterlands becomes a 4/3 white and blue Spirit creature with with prowess and “Whenever this creature attacks or blocks, torment yourself.” It's still a land. (To torment yourself, lose 3 life unless you discard a card or sacrifice a nonland permanent.)

Search your library for up to three basic land cards, reveal those cards, shuffle, then put one of them into the battlefield tapped, one into your hand and one on top of your library.

Exile the top two cards of your library. Until the end of your next turn, you may play those cards. If this spell was cast from a graveyard, you may play cards this way without paying their mana costs.
Flashback {5}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

{T}: Add one mana of any color in your commander's color identity.

Reach
When a creature you control scavenges Huolin Ranger, put a reach counter on that creature.
Scavenge {3}{G} ({3}{G}, Exile this card from your graveyard: Put a number of +1/+1 counters equal to this card's power on target creature. Scavenge only as a sorcery.)