msem-instigator

Put a +1/+1 counter on up to one target creature. (Then exile this card. You may play the land later from exile.)

When Sabne's Autumn enters the battlefield, search your library for a Forest card, reveal it, put it into your hand, then shuffle. You gain 3 life.
{1}{G}{G}: Transform Sabne's Autumn. Activate only if your fealty to Forests is five or greater.

Flying
Whenever a creature you control dies, put a +1/+1 counter on Drove of the Lost.
{1}, Sacrifice a creature: Each opponent loses 1 life. Gain 1 life.

Enchant opponent
At the beginning of enchanted player's upkeep, they choose one that hasn't been chosen yet —
• They discard three cards.
• They sacrifice three nonland permanents.
• You transform Enrapturing Grudge.
If Enrapturing Grudge would be put into a graveyard from anywhere, exile it instead.

Enchant player
When Curse of Grasping Air enters the battlefield, enchanted player reveals their hand. You choose a nonland card from it. That player discards that card.
Spells you cast that target enchanted player cost {1} less to cast.

(Transcend as a sorcery to gain that type and a +1/+1 counter.)
Ward {2}
{2}{U}: Demigod — Exchange a card in your hand and a noncreature, nonland card in your graveyard.
{6}{U}: God — Exchange control of two target permanents that share a card type.

Trample
Cavern Carver has haste as long as you control another creature with flash or haste.

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

As long as your deck contains only black and colorless cards, your minimum deck size is reduced by eight.

Slipstream (This creature can't be blocked as long as only creatures with slipstream are attacking.)
Whenever Happy Manta deals combat damage to a player, draw a card for each card type among spells you've cast this turn.

Menace
When Blackmoat Bully dies, put a +1/+1 counter and a menace counter on target creature you control.

Whenever you cast a spell, harmonize twice. (To harmonize, trigger up to one harmony of a permanent you control.)
Harmony — Yita, Almgrove Prodigy gains your choice of flying, first strike, vigilance, lifelink, hexproof, or haste until end of turn.

Enchant creature
When Philosophical Conundrum enters the battlefield, scry 1.
Enchanted creature can't attack or block.

Lumbering Stoneshell has hexproof as long as it's untapped.

Whenever Swift-Fingered Sneak enters the battlefield or attacks, you may discard a card. If you do, draw a card.

Prowess
Libraries can't be searched.
Spells you cast cost {1} less to cast for each permanent you control but don't own.

Menace
Art of war — At the beginning of your end step, if Shikai Hunters dealt damage to an opponent this turn, put a +1/+1 counter on it.

Shuffle your hand into your library, then draw X cards.

({T}: Add {R} or {G}.)
Glittering Grove enters the battlefield tapped.
Cycling {2} ({2}, Discard this card: Draw a card.)

Controlled Burn deals 2 damage to target player or planeswalker.
At the beginning of your upkeep, you may exile Controlled Burn from your graveyard. If you do, it deals 2 damage to target player or planeswalker.

When Urn of Heroes enters the battlefield, you may search your library for a legendary card, put that card into your graveyard, then shuffle.
{T}: Add {C}.

When Defiant Bristles dies, put a +1/+1 counter on target creature.

Flying
{1}{U}, Sacrifice Scholar's Assistant: Draw a card.

Each opponent sacrifices an artifact, an enchantment, and a creature with flying.

Each player can't cast more than one spell each turn.
You may cast spells from your hand without paying their mana costs.