msem-instigator

{1}{G}: Target land you control becomes a 3/3 green Elemental creature until end of turn.
{1}{U}: Target enchantment you control becomes a 2/2 blue Nymph creature with flying until end of turn.

Flying, trample
Whenever Bretala of Redsky attacks, it gains double strike until end of turn unless defending player sacrifices a creature.

When Bridled Narwhal enters the battlefield, you gain 5 life.

Augmented — Whenever Bril, the Oltenen Emissary enters the battlefield or attacks, if you've spent {W}{U}{B}{R}{G} to cast spells this turn, destroy target permanent.

{T}: Add {C}.
Crew 3 (Tap any number of creatures you control with total power 3 or greater: This Vehicle becomes an artifact creature until end of turn.)

Disgraced 1 (This enters with a -1/-1 counter. Whenever it deals combat damage to a player, remove all -1/-1 counters from it.)
When Bristling Baron dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control.

This spell costs {1} less to cast for each artifact and/or enchantment you control.

{6}{U}: Brume Trench-Thrasher can't be blocked this turn. This ability costs {1} less to activate for each instant and sorcery card you own in exile and in your graveyard.

Flying
Whenever a permanent you control becomes the target of a spell or ability you don't control, choose one —
• Create a 3/3 red Manticore creature token.
• Create two Treasure tokens.
• Draw a card.

Deathtouch
Once each turn, you may cast a creature spell from your graveyard by paying life equal to its mana value rather than paying its mana cost.

({T}: Add {W}.)
Bygone Guardian enters the battlefield tapped.
Vigilance
{2}{W}{W}: Bygone Guardian becomes a creature in addition to its other types until end of turn.

Whenever Byway Bruiser enters or leaves the battlefield, you may have it deal 3 damage to any target.

Vigilance
Whenever Cai Lan, the Chained perseveres, exile target creature an opponent controls until Cai Lan leaves the battlefield. (A creature perseveres when it survives damage.)

Flying
When Calamity Dragon enters the battlefield, it deals 2 damage to each creature you don't control. Whenever a creature dealt damage this way dies this turn, Calamity Dragon deals 2 damage to that creature's controller.

When Calamity Rose enters the battlefield, each player chooses a number of artifacts they control equal to the number of artifacts controlled by the player who controls the fewest, then sacrifices the rest. Players sacrifice creatures, enchantments, lands and planeswalkers the same way.

This spell costs {1} less to cast for each creature you control.
Trample
While you're searching your library, you may cast Camouflaged Sprareos from your library.

Trample
{2}{G}{G}: Put Canal Lurker from its owner's graveyard on top of its owner's library.

Vigilance
Resolute — Canopy Stomper can't be blocked by creatures with power 2 or less as long as Canopy Stomper's power is greater than its base power.

Primal {W} (During your turn, you may cast this spell for {W} instead of playing a land.)
When Captured Paletusk enters the battlefield, you may search your library for a basic Plains card, put it onto the battlefield tapped, then shuffle. You gain 2 life. Then sacrifice Captured Paletusk if it was cast for its primal cost.

{1}{W}, {T}: Put a +1/+1 counter on target creature without a +1/+1 counter. Activate only as a sorcery.

This spell costs {1} less to cast for each creature card in your graveyard.
Trample

{2}: Carven Guardian gains reach until end of turn.

Flying, haste
When Cataclysmic Skytyrant enters the battlefield, sacrifice all other non-Dragon creatures you control. For each creature sacrificed this way, create a 3/3 red Dragon creature token with flying.

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