msem-instigator

{1}{B}, Sacrifice another creature: Draw a card and create an Idol token. (It's an artifact with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)
{2}{B}, Sacrifice three Idols: Return Demon of Hubris from your graveyard to the battlefield. Activate only as a sorcery.

Augmented — At the beginning of combat on your turn, if you've spent {W}{U}{B}{R}{G} to cast spells this turn, put a +1/+1 counter on Second Wave Explorer.

Rhapsody {4}{R}{W} (Pay {4}{R}{W} to cast this as a 4/4, or as a sorcery to make it become a 4/4.)
Lifelink, haste

Target creature gets -4/-4 until end of turn. If that creature would die this turn, exile it instead.
Cycling {2} ({2}, Discard this card: Draw a card.)

Enchantment creatures you control get +2/+2.

Enchant player
Whenever one or more creatures you control die, enchanted player loses 1 life and you gain 1 life.

Whenever you cast an instant or sorcery spell, you may copy it, and you may choose new targets for the copy. Do this only once each turn.
At the beginning of your end step, if Leyran Spellclaw didn't attack this turn, transform it.

At the beginning of each combat, if you control a creature with flying, Magnific Wilderkin gets +1/+1 and gains flying until end of turn. The same is true for first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, reach, trample, and vigilance.

Whenever a creature enters, destroy it unless its controller pays 3 life.

When Haunted Hermit enters, choose one —
• Put a +1/+1 counter on Haunted Hermit.
• Create a 1/1 white Spirit creature token with flying.

{W}, {T}: Target attacking creature gets +1/+1 until end of turn. This ability costs {W} less to activate if it targets a Soldier.

Enchant creature you control
When Thassa's Benefaction enters, scry 2.
Enchanted creature gets +1/+0 and has flying.

Each other Okus planeswalker you control enters with two additional loyalty counters on it.
[–2]: Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

This spell can't be countered.
Vigilance
Noncreature spells cost {1} more to cast.

Whenever you cast a storied spell, you may pay {1}. If you do, draw a card. (Enchantments and legendary spells are storied.)
Sacrifice Right to Rule: Storied permanents you control gain indestructible until end of turn.

Esoteric Egg is all colors.
{T}: Add one mana of any color.

If you would draw a card, you may instead reveal cards from the top of your library until you reveal an enchantment card. Put that card into your hand. Put the rest on the bottom of your library in a random order.
{3}, {T}: You may cast an enchantment spell from your hand without paying its mana cost or activate a submodule of a permanent you control without paying its activation cost.

{3}{W}: Tap target creature with power 4 or greater.

Flash
If an opponent would draw one or more cards except during their draw step, instead they draw a card and you create that many 1/1 white Bird creature tokens with flying.

Improve {1} ({1}: Put a +1/+1 counter on this creature. This costs {1} more to activate for each +1/+1 counter on it. Improve only as a sorcery.)
Once each turn, when one or more counters are put on a permanent you control, create a 1/1 colorless Human creature token.
Whenever you attack with three or more creatures, destroy up to one target artifact or enchantment.

Whenever Barricade Watch is dealt damage, put a +1/+1 counter on it. (It must survive the damage to get the counter.)

Creatures you control gain deathtouch until end of turn.

{T}: Add one mana of any color. If you spend this mana to cast a face-down creature spell, you gain 2 life.

When Opulent Proprietor enters, you may search your library and/or graveyard for an Aura, Aurashaper, Equipment, or Vehicle card, reveal it, and put it into your hand. If you search your library this way, shuffle.

Haste
{2}{U}: Volatile Alchemist gains vigilance until end of turn and can't be blocked this turn.