msem-instigator

Look at the top two cards of your library. You may shuffle.
Draw two cards. You lose 2 life.

Whenever Sporeflow Propagator or another nontoken creature you control enters, germinate. (Put a +1/+1 counter on a creature or create a 1/1 green Saproling creature token.)

{1}, {T}, Move a -1/-1 counter from another creature onto Fervent Arbiter: Exile target creature you don't control until Fervent Arbiter leaves the battlefield.

Target creature gets +1/+1 and gains first strike until end of turn. Untap it.

Draw two cards. Then target opponent may give themselves two poison counters. If they don't, draw two cards.
{1}, Discard Unravel Prophecy: Add one mana of any color. Scry 1.

Search your library for a basic Forest or Plains card, put that card onto the battlefield tapped, then shuffle.
{3}{W}, Exile Migration Range from your graveyard: Create two 1/1 green and white Elk Spirit creature tokens. Activate only as a sorcery.

When this creature enters, create a Treasure token.

As Scrolls of Succession enters, choose a creature type.
Creatures you control of the chosen type get +1/+1.
{2}, {T}: Draw a card. Then discard a card unless you control three or more creatures of the chosen type.

Determined Chevalier has vigilance as long as it's embattled. (A creature is embattled if it has a counter on it or a permanent you control attached to it.)

Return target creature card with mana value 3 or less from your graveyard to the battlefield. If its mana value is less than 3, you gain life equal to the difference.

{3}{B}{B}: Return target Zombie creature card from your graveyard to the battlefield.
Whenever another creature you control enters from a graveyard or you revive a creature token, that creature gets +2/+0 and gains haste and menace until end of turn.

This spell costs {1} less to cast if you have more life than an opponent and {1} less to cast if you control a Cleric.
Deathtouch

You gain 3 life.
Draw a card.

Return target creature card from your graveyard to your hand. You may trigger a death knell of that card.

Tracking Party enters with a +1/+1 counter on it.
{T}, Remove a +1/+1 counter from Tracking Party and exert it: Destroy target artifact or enchantment. (An exerted creature won't untap during your next untap step.)

Enchant creature
When Chords of Order enters, put a +1/+1 counter on enchanted creature.
Whenever enchanted creature attacks, tap up to one target creature without a +1/+1 counter on it, then untap up to one target creature with a +1/+1 counter on it.

Whenever one or more creatures you control with counters on them attack, draw a card.

Outer Wall Guard enters with a +1/+1 counter on it if you gained life this turn.

Exile target creature you don't control. Its controller may search their library for a creature card with a different name, reveal it, put it into their hand, then shuffle.

When Transcended Explorer enters, if you control another enchantment, draw a card.

Create a token that's a copy of target creature, except it has haste and “At the beginning of the end step, sacrifice this permanent.”
Flashback {1}{G}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Flying
When Cloudheath Sentinel enters, return target artifact card with mana value 2 or less from your graveyard to the battlefield.

Survivors you control have lifelink.

Choose two —
• Attacking creatures target player controls get +2/+0 and gain first strike until end of turn.
• Jeska's Command deals 3 damage to target creature.
• Creatures target player controls without flying can't block this turn.
• Target player exiles the top card of their library. Until the end of their next turn, they may play that card.

Whenever you cast a spell that's red, green, white, or blue, each opponent loses 1 life and you gain 1 life.