msem-instigator

Enchant creature
Embody (Enchanted creature is a copy of this card except for its types.)
As long as Legend of the Generous is tapped, other creatures you control get +2/+2.

Defender, trample
Whenever you lose life, Loyal Watchdog may attack as though it didn't have defender until the beginning of your next end step.

Look at the top five cards of your library. You may reveal a land or enchantment card from among them and put it into your hand. Then put the rest on the bottom of your library in any order.

Scion of the Wild's power and toughness are each equal to the number of creatures you control.

Creatures you control get +2/+2 and gain trample until end of turn.

Search your library for a basic land card, reveal it, put it into your hand, then shuffle. You gain 2 life.

{T}, Tap an untapped creature you control: You draw a card and you gain 1 life.

Rapport — Whenever Desraen, Serpent's Will and at least one other creature you control become tapped, you may cast target instant or sorcery card with mana value 3 or less from your graveyard without paying its mana cost. If that spell would be put into your graveyard, exile it instead.

[+1]: Tap up to one target nonland permanent. It doesn't untap during its controller's next untap step, and its activated abilities can't be activated until it becomes untapped.
[–4]: Target player skips their next untap step.
[–8]: Exile all tapped permanents.

Each player draws a card, then target player mills X cards, where X is the number of cards players have drawn this turn.

Scrollsnatcher can't block and can't be blocked.
Whenever Scrollsnatcher deals combat damage to a player, look at the top card of each library, then put any number of those cards into their owner's graveyards.

Nonbasic lands have “Whenever this land becomes tapped, you lose 1 life unless you sacrifice this land.”

When Keeper of the Whispers enters, nourish 3. (To nourish 3, either put three +1/+1 counters on this creature or create three 1/1 white Citizen creature tokens.)
Sacrifice a creature: Creatures you control get +1/+1 until end of turn.

Flying, haste
Whenever another creature dies, Twinfire Dragon gets +1/+0 until end of turn.

Defender, reach
{T}, Discard a card: Create a 0/2 red and green Scarecrow creature token with defender and reach.
{R}{G}, {T}: Embergourd Scarecrow deals X damage to target player or planeswalker, where X is the number of creatures with defender you control.

When Spirit of Autumn enters, nourish X, where X is the number of creatures you control. (To nourish X, either put X +1/+1 counters on this creature or create X 1/1 white Citizen creature tokens.)

Whenever Gallant Chevalier attacks or blocks, put a +1/+1 counter on it and each other creature you control with a +1/+1 counter on it.

Lifelink
Other creatures you control enter with an additional +1/+1 counter on them.
{2}{G}{W}: Nourish 1. (To nourish 1, either put a +1/+1 counter on this creature or create a 1/1 white Citizen creature token.)

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.

Whenever you cast an Aura spell, put two +1/+1 counters on Traveling Thespians.

Flying, haste
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

Rapport — Whenever Trae, Serpent's Grasp and at least one other creature you control become tapped, each player draws a card. Then Trae, Serpent's Grasp deals 2 damage to each opponent with four or more cards in hand.

{1}, {T}, Exile a land card from your graveyard: Add two mana in any combination of colors.
{B}{G}, {T}, Discard a card: Nourish 2. (To nourish 2, either put two +1/+1 counters on this creature or create two 1/1 white Citizen creature tokens.)

When Nomadic Patriarch enters, nourish 1. (To nourish 1, either put a +1/+1 counter on this creature or create a 1/1 white Citizen creature token.)
Remove a +1/+1 counter from Nomadic Patriarch: Put a +1/+1 counter on each other creature token you control.

Rapport — Whenever Aelinn, Serpent's Voice and at least one other creature you control become tapped, reveal the top card of your library. You may cast that card. If you don't, put it into your graveyard and Aelinn, Serpent's Voice deals 2 damage to each opponent.