msem-instigator

Trample
Cycling {2} ({2}, Discard this card: Draw a card.)

Flash
When Kaivilu, Ocean Warden enters, creatures your opponents control get -2/-2 and lose all abilities until end of turn.

Destroy target land an opponent controls. Its controller may search their library for a basic land card, put it onto the battlefield, then shuffle.
Draw a card.

Heroic — Whenever you cast a spell that targets Leina Tower Sentry, put a +1/+1 counter on Leina Tower Sentry and you gain 1 life.

Lifelink
Embellish {2}{B} (If you cast this spell for {2}{B}, create a 1/1 blue Thopter artifact creature token with flying when it enters.)

Whenever another nontoken creature you control enters, if it doesn't share a name with another creature you control or a creature card in your graveyard, put a +1/+1 counter on Guardian of the Divergent.

Flash
Prowess
When High Rollers Esteemed enters, you may choose new targets for target spell or ability unless its controller has High Rollers Esteemed deal 4 damage to them.

Flash (You may cast this spell any time you could cast an instant.)
When Volatimancer enters, you may have target creature have base power and toughness 1/1 until end of turn.

Blazing Exultation deals 3 damage to any target.
{2}{R}: Shuffle Blazing Exultation and up to one other instant or sorcery card from your graveyard into your library.

Flash
Enchant creature
When Roar of the Wilds enters, enchanted creature gets +3/+3 until end of turn.
When enchanted creature dies, create a 1/1 green Saproling creature token.

At the beginning of your end step, you may pay {W}. If you do, exile target creature you control, then return that card to the battlefield under your control.

When Spirit of the Sands enters, if you cast it, target opponent gains control of it.
At the beginning of your end step, draw three cards, then discard two cards.

Target creature gets +2/+2 until end of turn. If you cast this spell from exile, that creature gets +4/+4 and gains trample until end of turn instead.
Prophecy {G} (Once each turn, you may exile a card with prophecy as you reveal it. When you do, you may cast it for its prophecy cost as long as it's exiled.)

At the beginning of your upkeep, scry 1.
At the beginning of combat on your turn, if you cast both a creature spell and a noncreature spell this turn, you may have Glintwing Nest become a 4/4 Elemental Bird creature with flying in addition to its other types until end of turn.

Return all creature cards from your graveyard to the battlefield, then exile all but one of them.

Choose two or four —
• Return target creature to its owner's hand.
• Return target spell to its owner's hand.
• Return target sorcery card from your graveyard to your hand.
• Conjure a card named Fatigue and put it on top of your library. (It's a colorless sorcery that costs {2} with “Draw a card.”)

When Troubled Homesteader dies, draw a card.

All creatures get -2/-1.

Whenever Charmed Sage deals combat damage to a player, draw two cards.

Choose one —
• Search your library for a basic land card, reveal it, put it into your hand, then shuffle.
• Create a tapped token that's a copy of target token you control.

Target player discards two cards.

Ward {2}
As long as you control six or more lands, Frondpond Errand-Runner gets +2/+0 and can't be blocked.

Target creature gets +4/+4 until end of turn.

Flying
Improve {2} ({2}: Put a +1/+1 counter on this creature. This costs {1} more to activate for each +1/+1 counter on it. Improve only as a sorcery.)
At the beginning of combat on your turn, up to two target embattled creatures gain double strike until end of turn. (A creature is embattled if it has a counter on it or has a permanent you control attached to it.)

Exile target nonland permanent. Create an Idol token. (It's an artifact with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)