msem-instigator

When Marshcroaker Coaching enters, create three 1/1 blue Frog creature tokens.
Frogs you control have “{T}: Target creature gains flying until end of turn.”

Whenever you condemn a creature, each opponent sacrifices a creature.
{4}{B}: Judge target creature you control. (Honor it by putting a +1/+1 counter on it or condemn it by sacrificing it to draw a card.)

Each player chooses up to half the creatures they control, then sacrifices the rest.

Pressure {6}{U}{U} (You may cast this spell for its pressure cost if seven or more cards are in your graveyard.)
Take an extra turn after this one. If this spell was cast for its pressure cost, during that turn, whenever you tap an Island for mana, add an additional {U}.
Exile Cuxuri Rift.

When Woopip Elder enters, germinate. (Put a +1/+1 counter on a creature or create a 1/1 green Saproling creature token.)

Lavatrailer enters tapped.
Whenever a creature attacks you, if Lavatrailer is tapped, Lavatrailer deals 1 damage to it.

Grizzled Woodcutter gets +1/+1 as long as you control an artifact.
Grizzled Woodcutter gets +1/+1 as long as you control an enchantment.

If you control ten or more nonland permanents, you get an emblem with “At the beginning of your end step, return target permanent card from your graveyard to the battlefield.”
Destroy all nonland permanents.

At the beginning of combat on your turn, target creature you control gets +1/+0 until end of turn. If you cast two or more spells this turn, it also gains haste and trample until end of turn. If you cast three or more spells this turn, it gets an additional +2/+0 until end of turn.

Garden Cherub's power and toughness are each equal to the number of creatures you control.
Garden Cherub can't be blocked by creatures with power 2 or less.

(As this Discovery enters and after your draw step, add a progress counter. Stop after you've discovered.)
Archive 6 (As this enters, shuffle the top six cards of your main library into a new face up library. Sacrifice this after the archived library is empty.)
Draw a card from each of your libraries.
discover — When you draw the last card from the archived library, create a 4/4 blue Sphinx Wizard creature token with flying.

Once each turn, when a creature you control attacks alone, you may untap target attacking creature. After this combat, there's an additional combat step.

Target creature gains indestructible until end of turn.
Fuse (You may cast one or both halves of this card from your hand.)

When Meletis Oracle enters, scry 1, then draw a card.

Up to one target attacking creature gets +3/+3 and gains trample until end of turn.
Harmonize. (Trigger up to one harmony of a permanent you control.)

Each player who controls a creature with power 3 or less draws a card. Then destroy all creatures.

Whenever a card is put into your graveyard from your library, you may put it on top of your library.
{U}{B}, Sacrifice Rallios' Return: Until end of turn, you may play target card from your graveyard. If that spell would be put into a graveyard, exile it instead.

Ward {4}
{4}{U}: Cyclesmith Oracle can't be blocked until end of turn. This ability costs {X} less to activate, where X is the number of card types among cards in your graveyard.

At the beginning of your upkeep, 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.”)
{5}{W}{W}, Sacrifice three Idols: Return target creature card from your graveyard to the battlefield with three +1/+1 counters on it.

Scry 1.
Draw a card.

Trample
Creatures your opponents control get -1/-0.

At the beginning of your upkeep, each player conjures a card named Data-Point into their hand. (It's a sorcery that costs {2} with “Draw a card.”)

{1}{B}, Sacrifice another creature: Put a +1/+1 counter on Nemesis Eidolon. Draw a card. Activate only as a sorcery.

Glitch {2} (Remove one [restriction] for each time you pay the glitch cost.)
Destroy target artifact or enchantment [with mana value 3 or less].