msem-instigator

Whenever an opponent activates an ability of a permanent, if it isn't a mana ability, you gain 1 life and create a Gold token. (It's an artifact with “Sacrifice this artifact: Add one mana of any color.”)

For each color of mana spent to cast this spell, create a 0/2 green Egg creature token. (Then exile this card. You may cast the creature later from exile.)

{T}, Put a -1/-1 counter on a creature you control: Tap target creature.

Destroy all lands. For each land destroyed this way, its controller creates a colorless land token named Blasted Lands with “{T}: Add {C}.”

Choose one. If you attacked with a creature with mana value 5 or greater this turn, you may choose any number instead.
• Destroy target artifact.
• Destroy target land.
• Fate of the World deals 3 damage divided as you choose among one, two, or three targets.

At the beginning of your upkeep, return target enchantment card from your graveyard to your hand.
Whenever Reflect on Serenity or another enchantment you control enters or leaves the battlefield, each opponent loses 1 life and you gain 1 life.

Deathtouch, protection from legendary
Vielle, Undercity Wayfarer has all loyalty abilities of permanents on the battlefield that cost +1, +0, or -1. (Before cost changes. Add or remove loyalty counters from Vielle to pay their loyalty costs.)

When Uncovered Mine enters and at the beginning of your upkeep, return a random card from your graveyard to your hand.

Enchant creature
Enchanted creature can't attack or block.

When Giku Weaponsmith enters, create two colorless Equipment artifact tokens with “Equipped creature gets +1/+1” and equip {1}.

Flash
Flying
When Meletis Stratomancer enters, target creature an opponent controls gets -2/-0 until end of turn.

Whenever attackers are declared, defending player may pay 2 life for each creature you control attacking them. Then target creature gets -X/-X until end of turn, where X is the number of times that player didn't pay life this way.

Each player sacrifices a creature and discards a card.
Fuse (You may cast one or both halves of this card from your hand.)

Take an extra turn after this one. At the beginning of that turn's upkeep, if you control a legendary creature, each opponent exiles the top card of their library. Until the end of that turn, you may play those cards and you may spend mana as though it were mana of any type to cast those spells.
Exile Stolen Moments.

(Choose only one work as a sorcery to add its ability.)
When The Royal Vignettes enters, exile target instant or sorcery card from your graveyard. Until your next turn, you may cast that card.
{1}{U}: Ju, the Artisan
Whenever you cast an instant spell, draw a card, then discard a card.
{1}{R}: Lan, the Poet
Whenever you cast a sorcery spell, create a 1/1 red Bard creature token with “This creature can't block.”

Create two 1/1 red Elemental creature tokens.

{4}, {T}, Exile Deathwind Detonator: Destroy all nonland permanents. Each player gets an emblem with “At the beginning of your upkeep, you lose 1 life.”

Each player sacrifices a creature.
Coalesce {5}{B} (You may cast this from your graveyard for {5}{B}. If you do, it enters as a Horror creature after it resolves. Exile it if it would leave the battlefield or not resolve.)

[+1]: Up to one target creature gets +2/+0 until end of turn. Each player loses 1 life.
[–X]: Return target creature card with mana value X from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield.
[–7]: For each 1 life target player has less than their starting life total, create a 1/1 black Bird creature token with flying and deathtouch.

(Transform this if it's not attached to a creature. Pay {2}{U} as a sorcery to unattach it.)
Enchant creature you control
Steed of the Loch's rider gets +2/+1.
Whenever Steed of the Loch's rider attacks, you may tap target creature an opponent controls.

Vigilance
Other Dwarves you control get +1/+1 and have vigilance.
Whenever you activate a loyalty ability of a permanent, create two 1/1 white Dwarf creature tokens.

As long as Arboreal Runes is on the battlefield or in your graveyard, it's a Forest land in addition to its other types.
{T}: Add one mana of any color.

As Destroyed Isle enters, you may pay 3 life. If you don't, it enters tapped.
{T}: Add {W}, {U}, or {B}.

Trample
Whenever Komurk Harvester or another creature you control dies, draw cards equal to that creature's power.

Defender (This creature can't attack.)
Flying (This creature can't be blocked except by creatures with flying or reach.)
Hexproof (This creature can't be the target of spells or abilities your opponents control.)