msem-instigator

Deathtouch
Whenever another creature named Winter's Whelp you control enters, you draw a card and you lose 1 life.

Whenever a creature is returned to your hand, scry 1.
{4}{G}{U}: Reveal the top card of your library. If it's a permanent card, you may put it onto the battlefield.

{T}: Add {R}. Put a charge counter on Wistful Automaton.
Remove three charge counters from Wistful Automaton: Transform it.

When Witch's Invitation enters, you may put a -1/-1 counter on target creature.
{2}, {T}: Tap target creature with a -1/-1 counter on it.

Flash
When Witch's Invocation enters, draw a card.
You may cast spells as though they had flash.

First strike, hexproof

Target creature gets -6/-6 until end of turn.
Create a black enchantment token named Blight with “At the beginning of your upkeep, you lose 1 life.”

Whenever Withering Husk enters or attacks, you may discard a card and pay 1 life. If you do, draw a card, then each opponent loses 1 life.
Recite {R} (You may cast this creature from your graveyard for its recite cost. If you do, exile it when it enters or if it would leave the battlefield.)

If a permanent you control with mana value 5 or greater entering causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.

Untap target creature you control. It gets +1/+4 and gains hexproof and reach until end of turn.

Equipped creature has indestructible as long as it's tapped.
Equip {3}

Harmony — Germinate. (Put a +1/+1 counter on a creature or create a 1/1 green Saproling creature token.)
When Woopip Chef enters, harmonize. (Trigger up to one harmony of one permanent you control.)

As an additional cost to cast this spell, sacrifice a creature.
Draw two cards. You gain 2 life.

Put a +1/+1 counter on target creature. It gains first strike until end of turn. You gain 2 life.

{4}, {T}: Look at the top card of your library. If it's a land card, you may put it onto the battlefield tapped. If you don't put the card onto the battlefield, put it into your hand.

Whenever one or more creatures you control attack, you may put a progress counter on Worldwide Reach.
[progress 2+] Whenever you cast a noncreature spell, creatures you control get +1/+1 until end of turn.
[progress 4+] Whenever you cast a noncreature spell, creatures you control gain lifelink until end of turn.
Whenever you cast a noncreature spell, creatures you control gain lifelink until end of turn.

{2}{W}, Exile Worldwise Ascetic from your graveyard: Create a green Aura enchantment token named Years of Experience attached to target creature. The token has enchant creature and “Enchanted creature gets +2/+2.” Activate only as a sorcery.

Flash
When Wormwood's Agent dies, create a Vial token. (It's an artifact with “{1}, Sacrifice this and another permanent: Draw a card. Activate only during your turn.”)

Whenever equipped creature attacks, it gets +2/+2 and gains trample until end of turn.
Equip {2}

{T}: Scry 1.
{1}{U}, {T}: Draw a card.

Target creature you control gets +3/+3 and gains lifelink and trample until end of turn.
Inscribe {3}{G}{W} ({3}{G}{W}: Exile this card from your hand inscribed on a creature you control. Whenever that creature attacks, its controller may cast a copy of the inscribed card without paying its mana cost. Inscribe only as a sorcery.)

Choose target creature you control. If it has a +1/+1 counter on it, put an additional +1/+1 counter on it. Then it fights target creature you don't control.

At the beginning of your end step, if you cast no spells this turn, you may return Wrathful Meditant to its owner's hand.

Enchant creature you control
Enchanted creature gets +1/+1 and has hexproof and “{T}: Target player mills two cards.”
Whenever you play a land, untap enchanted creature.

Whenever another enchantment you control enters, you get a glory counter. (You lose glory counters before life. A player with ten or more glory counters wins the game.)