msem-instigator

When Silverhorn Battlemaster enters, put a +1/+1 counter on up to two target Warriors you control.
Whenever Silverhorn Battlemaster deals combat damage to a player, permutate. (You may remove a counter from a creature you control. If you do, put two +1/+1 counters on a different creature you control.)

Whenever Sower of Sabne's Harvest enters or attacks, align X, where X is your fealty to Forests. (Choose modes with total ★ less than or equal to the number of Forests you control. You may choose modes multiple times.)
• ★★ — Put a +1/+1 counter on target creature.
• ★★★ — Exile target artifact or enchantment.
• ★★★★★ — You gain 5 life.

When Steward of Empire's Cradle enters, you may search your library for a Discovery, Quest, or Saga card, reveal it, then shuffle and put that card on top.
Civilized — If an ability of an enchantment you control triggers, if you control an artifact, a creature and an enchantment, that ability triggers an additional time.

When Tantalizing Glutton enters, create a green Aura Curse enchantment token named Just Out of Reach attached to target player. The token has enchant player and “At the beginning of each of enchanted player's opponents' upkeeps, if that player doesn't control a Food, they create a Food token.”

Vigilance
When Territorial Camaar enters, you may sacrifice a land. If you do, search your library for a Desert card, put it onto the battlefield tapped, then shuffle.

Harmony — Search your library for a basic land or Desert card, reveal it, and put it into your hand. Then shuffle.
When Trumpeting Pathmaker enters, harmonize. (Trigger up to one harmony of a permanent you control.)

Motivate 3 (When this creature enters, you may motivate target creature with lesser power than this by putting three +1/+1 counters on it.)
At the beginning of combat on your turn, you may have target creature you control gain vigilance until end of turn.

Assault {2}{G} (Whenever this attacks, if it has no +1/+1 counters on it, you may pay its assault cost to put a +1/+1 counter on it.)
When Wildborn Marauder assaults, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Harmony — You may pay {1}{G}. If you do, create a 3/3 green Beast creature token.
When Wildheart Chorister enters, harmonize. (Trigger up to one harmony of a permanent you control.)

Wanderlust — Whenever a land you control enters, if you control four or more differently named lands, create a 1/1 green Saproling creature token.

Legendary spells you cast have nonlegendary cascade. (When you cast that spell, exile cards from the top of your library until you exile a nonlegendary nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)

When Aethermancer's Companion enters, aetherize up to two other non-Cat permanents you control. (Create tokens that are copies of each of them, then exile them.)
Recite {5}{W}{U} (You may cast this spell from your graveyard for its recite cost. If you do, exile it when it enters or if it would leave the battlefield.)

Flying, first strike, vigilance, trample, lifelink
{4}: Put a +1/+1 counter on Alin and Meva, Warqueens.

When Amira, Grand Inventor enters, create a 1/1 colorless Construct Artificer artifact creature token. If you control six or more artifacts, create a 6/6 colorless Golem artifact creature token instead.
Artifact tokens you control have all activated abilities of other artifact tokens you control.

Aetherize each permanent you control. Exile Beneath the Horizon. (To aetherize a permanent, create a token that's a copy of it, then exile that token.)

Ward {2}
Whenever Brunig enters or attacks, you may shuffle a card you own from outside the game into your library. If you do, you gain 2 life.
Brunig gets +2/+2 and has trample as long as your library contains at least forty cards more than the minimum deck size.

Once each turn, when you spend mana from a Desert to cast a spell, create a 1/1 red and green Bird creature token with flying and vigilance.
Whenever three or more creatures you control deal combat damage to a player, untap each land you control.

Defiant (Whenever this creature takes damage, if it survives and wasn't defiant, put a +1/+1 counter on it and it becomes defiant.)
Each creature you control with a +1/+1 counter on it has lifelink.

When Condemned Cavalier enters, create a white and black Aura Curse enchantment token named Profane March attached to target player. The token has enchant player and “Whenever a creature enchanted player controls attacks, that player loses 1 life and defending player gains 1 life.”

Level experience (Whenever this creature attacks, if it has fewer than three level counters on it, put a level counter on it.)
When Copperhide Calf has three or more level counters on it, remove them all and transform it. [2/2]
[level 1-3] Prevent the first 1 damage that would be dealt to Copperhide Calf each turn. [3/3]

Level experience, vigilance, trample
Prevent all but the first 1 damage that would be dealt to Verdigris Behemoth each turn. [5/5]
[level 3+] Whenever Verdigris Behemoth deals combat damage to a player, you may destroy target artifact or enchantment that player controls. [7/7]

Vigilance
Whenever Darutu, God of Bounty enters or attacks, you may put a +1/+1 counter on another target Ox you control.
Enchantment spells you cast have harness. Only Oxen can be tapped to harness those spells. (You may tap an Ox you control as you cast that spell. If you do, reduce that spell's mana cost by that Ox's power.)

Dawson's Negotiations deals 3 damage to any target. Players discard cards equal to the amount of excess damage dealt to a permanent they control this way.

Concord — {T}, Sacrifice Disciple of Destruction: Destroy target nonland permanent. Activate only if there are four or more card types among permanents you control.

You may look at the top card of your library any time.
You may play the top card of your library if it's a land card or a creature card with power 2 or less.