msem-instigator

Enchant creature
Enchanted creature gets -3/-3.
When enchanted creature dies, its controller may scry 1.

{1}, Sacrifice Ornate Incense: Draw a card. You gain 1 life.

When Over the Horizon enters, scry 1.
{T}: Add {C}.
{1}, {T}: Return Over the Horizon to its owner's hand.

Whenever Overgrowth Host attacks, germinate. Then creatures you control that are Saprolings or have counters on them gain trample until end of turn.
Saprolings you control get +1/+1.

This spell can't be countered.
Hexproof (This creature can't be the target of spells or abilities your opponents control.)
Haste (This creature can attack and {T} as soon as it comes under your control.)

{1}, {T}, Pay 1 life: Add one mana of any color. Put a charge counter on Paradox Rings.
{T}, Remove three charge counters from Paradox Rings and sacrifice it: Draw a card.

Players can't pay alternative costs to cast spells. (Casting a spell without paying its mana cost is an alternative cost.)

{W}: Parish Custodian gains lifelink until end of turn. (Damage dealt by this creature also causes you to gain that much life.)

Tithe (As you cast this spell, you may tap three artifacts and/or creatures you control.)
Tap target creature. If this spell's tithe was paid, exile that creature.

Tithe (As you cast this spell, you may tap three artifacts and/or creatures you control.)
Create two 1/1 red Cleric creature tokens with haste. If this spell's tithe was paid, create four of those tokens instead.

Harmony — Creatures you control get +1/+0 and gain vigilance until end of turn.
When Plume de Val Singer enters, harmonize. (Trigger up to one harmony of one permanent you control.)

Whenever a player gains life, that player loses 2 life.

{1}{U}: Target creature can't be blocked this turn.

At the beginning of each upkeep, if it's an extra turn, end the turn.
If a player would search a library, that player searches the top four cards of that library instead.

({T}: Add {R} or {W}.)
As Prayer Hall enters, you may pay {1}. If you don't, Prayer Hall enters tapped.

Harmony — Exile another target creature until Pretentious Performer leaves the battlefield.
When Pretentious Performer enters, harmonize. (Trigger up to one harmony of one permanent you control.)

Vigilance, trample
Prized Marshcroaker can block an additional creature each combat.

Enchant creature
Enchanted creature can't attack or block.
Enchanted creature has “{7}: Destroy Proselytize.”

Harmony — Pyrodancer deals 1 damage to each opponent.
When Pyrodancer enters, harmonize. (Trigger up to one harmony of one permanent you control.)

As long as it's your turn, Rallying Rector has first strike.
Whenever Rallying Rector attacks, you may discard a card. If you do, search your library for a card named Rallying Rector, reveal it, put it into your hand, then shuffle.

Enchant opponent
When Ranidaphobia enters, create a 1/1 blue Frog creature token.
Creatures enchanted player controls can't block Frogs.

Counter target spell unless its controller pays {1}. If they do, draw a card.

Tithe (As you cast this spell, you may tap three artifacts and/or creatures you control.)
Return target creature or planeswalker card from your graveyard to your hand. If this spell's tithe was paid, return that card to the battlefield instead.

Choose target player. Until end of turn, if a spell or ability that player controls would cause them to draw a card, each of their opponents draws a card instead.