msem-instigator

Flying
Whenever Soaring Biome attacks, create a Plains token, Island token, Swamp token, Mountain token, or Forest token. Sacrifice that land at the beginning of the next end step.
Crew 2 (Tap any number of creatures you control with total power 2 or greater: This Vehicle becomes an artifact creature until end of turn.)

Create a 1/1 blue Bird creature token with flying.
Inscribe {2}{U} ({2}{U}: Exile this card from your hand inscribed on a creature you control. Whenever that creature attacks, its controller may cast a copy of the inscribed card without paying its mana cost. Inscribe only as a sorcery.)

({T}: Add {G} or {U}.)
Soaring Rainforest enters the battlefield tapped.
{1}, {T}: Add {G}{G} or {U}{U}.

({T}: Add {U} or {B}.)
Sodden Cavern enters the battlefield tapped.

Flying, vigilance
Whenever one or more other creatures you control attack, those creatures get +0/+2 until end of turn.
Whenever one or more other creatures you control block, those creatures get +2/+0 until end of turn.

({T}: Add {B} or {G}.)
Somber Marsh enters the battlefield tapped.

Target creature gets -3/-3 until end of turn. If you control a legendary creature, instead destroy that creature.

When Soul Jar enters the battlefield, exile target creature and each other creature with the same name as that creature until Soul Jar leaves the battlefield.

Destroy target creature unless its controller pays {3}.

When Soulblade enters the battlefield, exile target creature card with mana value 3 or less from your graveyard.
Whenever equipped creature attacks, create a token that's a copy of a card exiled with Soulblade that's tapped and attacking. Exile the token at end of combat.
Equip {1}

{1}, Sacrifice a creature: Each opponent loses 1 life and you gain 1 life.

Poisonous 3 (Whenever this creature deals combat damage to a player, that player gets three poison counters.)
When Soulbreaker of Mautakesh enters the battlefield, target poisoned player sacrifices a creature.

Activated abilities of cards in your graveyard cost {2} less to activate.

Activated abilities of cards in your hand cost up to {1} less to activate. This effect can't reduce the amount of mana an ability costs to activate to less than one mana.

{1}, Sacrifice Sovereign Stone: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.
{1}, Sacrifice Sovereign Stone: Draw a card.

Counter target spell unless its controller pays {X}. Look at the top X cards of your library. Put up to one of them on top of your library and the rest on the bottom of your library in a random order.

Flying, haste
Whenever you cast an instant or sorcery spell, Sovereign of Old Jidai gets +1/+0 until end of turn.

All creatures get -2/-2 until end of turn. At the beginning of the next end step, if three or more creatures died this turn, create two tapped Treasure tokens.

Whenever a land enters the battlefield under your control, you gain 1 life.
{3}{G}, Sacrifice Sower of Spring: Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.

Enchant land
Enchanted land's name is Flowering Expanse.
Whenever enchanted land is tapped for mana, add one mana of any color.

Colorless creatures you control have “{T}: Add {C}.”

Enchant creature
When Spectral Chains enters the battlefield, create two 1/1 white Spirit creature tokens with flying.
As long as you control a creature, enchanted creature can't attack or block and its activated abilities can't be activated.

When Spectral Kitsune enters the battlefield, you may remove a counter from target player or permanent.

When Spellblade enters the battlefield, you may exile an instant card with mana value 2 or less from your hand.
At the beginning of your end step, if equipped creature dealt damage to an opponent this turn, you may copy the exiled card. If you do, you may cast the copy without paying its mana cost.
Equip {2}

Hexproof
Creatures you control get +1/+1 for each Aura attached to them.