msem-instigator

Golden Glade enters tapped.
{1}, {T}: Add two mana of any one color.

Spirited (When this creature enters, you may activate one of its activated abilities without paying its costs.)
{1}{R}, Discard a red card: Roggar deals 2 damage to any target. This damage can't be prevented.
{2}{R}, Exile a red card from your graveyard: Create two tapped 1/1 red Elemental creature tokens.

Flying, trample
Harbinger of Falling Skies enters with X +1/+1 counters on it.
Whenever Harbinger of Falling Skies attacks, you may remove a +1/+1 counter from it. If you do, draw a card.

Lands you control have “{T}: Add one mana of any color.”
{T}: Add one mana of any color.

Vigilance
Whenever Bartimus attacks, another target attacking creature gets +1/+1 until end of turn. If that creature is a Soldier, put a +1/+1 counter on it instead.

Flying
Whenever an enchantment you control enters, target creature you control gets +1/+1 until end of turn.

{1}, Sacrifice Curious Fossil: Scry 2.
{2}{U}: Return Curious Fossil from your graveyard to the battlefield transformed. Activate only during your turn.

Reveal the top card of your library and put that card into your hand. If it's a permanent card with mana value X or less, instead you may put it onto the battlefield. If you do and fewer than seven permanents have been put onto the battlefield this way, repeat this process. X can't be 0.

Menace
Landfall — Whenever a land you control enters, Mawdryk's Elite gets +1/+0 and gains deathtouch until end of turn.

At the beginning of your upkeep, Suitor of the Sea deals 1 damage to each player.

Unveil {3}{G}{W} ({3}{G}{W}: Transform this. Unveil only as a sorcery.)

Wanderlust — Target creature you control gets +2/+2 until end of turn. If you control four or more differently named lands, that creature gains protection from everything until end of turn.

Submerge target artifact or enchantment. (To submerge a card, exile it, then put it on the battlefield face down under its owner's control as a 2/2 creature.)

Target creature you control gets +3/+0 and gains lifelink and indestructible until end of turn.

When target creature you control dies this turn, create a token that's a copy of it, except it has no mana cost.

Whenever Lone Freelancer becomes blocked, it deals damage equal to its power to defending player.

({T}: Add {W} or {U}.)
Rainsculpted Gorge enters tapped.
{1}, {T}: Add {W}{W} or {U}{U}.

Experience (Whenever this creature attacks, if it has fewer than three +1/+1 counters on it, put a +1/+1 counter on it.)
Whenever a creature you control with a +1/+1 counter on it deals combat damage to a player, arm that creature. (Create a colorless Equipment artifact token with “Equipped creature gets +1/+0” and equip {2}, then attach it to that creature.)

Target player mills seven cards. Then exile two cards from that player's graveyard.

Whenever Blood Constrictor becomes blocked by a creature, you gain life equal to that creature's toughness.

Trample
Cadence (Whenever you cast a spell, if its mana value is greater than this creature's power, put a +1/+1 counter on this creature.)
Whenever Rage-Fueled Adventurer attacks, you may have it fight target creature you don't control.

Lionize {2}{R} ({2}{R}, Exile this card from your hand: Put a +1/+1 counter on target creature and it gains the following abilities until end of turn. You may cast this card on a later turn from exile.)
Double strike

As an additional cost to cast this spell, discard a nonland card.
Target player reveals their hand. You choose a nonland card from it. That player discards that card.

When Patient Herbology enters, rouse 2. (Distribute two +1/+1 counters among permanents you control. If they aren't creatures, tap them and they become 0/0 creatures in addition to their other types.)
Sacrifice Patient Herbology: Untap target land. You gain 2 life.

Flying, haste
Whenever Scourge of the Skies attacks, you may have it deal 5 damage to target creature.