msem-instigator

Whenever one or more creatures you control deal combat damage to a player or planeswalker, put a +1/+1 counter on target creature you control.

Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.
Kindle 2—{2}{G} ({2}{G}, Exile this card from your graveyard: Create two 1/1 colorless Elemental creature tokens. Kindle only as a sorcery.)

When Sahra Poet-Priest enters, create a Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)
{R}: Sahra Poet-Priest gets +1/+0 until end of turn.

Flying
Other creatures you control with flying get +1/+1.

Untap target creature you control. It gets +1/+4 and gains hexproof and reach until end of turn.

You may pay {W}{U}{B}{R}{G} rather than pay this spell's mana cost.
Flying, first strike, vigilance, trample, lifelink

Bound by Nature enters with X nature counters on it.
You can't cast nonpermanent spells.
Creatures you control get +1/+1 for each nature counter on Bound by Nature and have “{T}: Add {G}.”

Choose one or both—
• Target creature has base toughness 1 until end of turn.
• Remove all but one loyalty counter from target planeswalker.

Spitfire deals 2 damage to target creature. Up to one target creature you control gets +2/+0 until end of turn.

Goblincycling {1}{R}, Warriorcycling {1}{R} ({1}{R}, Discard this card: Search your library for a Goblin or Warrior card, reveal it, and put it into your hand. Then shuffle.)

Exile target creature card from a graveyard. Create a token that's a copy of that creature, except it's a colorless artifact. (It's not a creature.)

When Voiceless Assailant enters, you may search your library for up to three cards named Voiceless Assailant, reveal them, put them into your hand, then shuffle.

Equipped creature gets +4/+3.
Equip—{2}, Put a -1/-1 counter on a creature you control.

{X}, {T}, Sacrifice an artifact: Exile target artifact card in your graveyard with mana value X. Create a token that's a copy of it. Activate only as a sorcery.

({T}: Add {W}.)
As Calcified Dunes enters, you may pay 1 life. If you don't, Calcified Dunes enters tapped.

Enchant creature
When Spectral Chains enters, 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.

As an additional cost to cast this spell, you may pay {1}{R}.
Put a double strike counter on target creature you control.
If this spell's additional cost was paid, untap each creature you control that attacked this turn instead. After this main phase, there is an additional combat phase followed by an additional main phase.

Whenever Silt Lurker deals combat damage to a player, mill three cards, then draw a card if seven or more cards are in your graveyard.
Cycling {G} ({G}, Discard this card: Draw a card.)

Deathtouch
When The Terror of Shady Cove enters, target opponent sacrifices an artifact. If they can't, create a 3/3 green Slug creature token with deathtouch. Then repeat this process for an enchantment and a nonbasic land.

Starting with the next opponent in turn order, each player sacrifices a permanent. Repeat this process until the total mana value of all permanents sacrificed this way is 13 or greater, or until thirteen or more permanents have been sacrificed this way, or until there are no nonland permanents on the battlefield, whichever happens first. Exile Utter Pandemonium.

{G}{U}: Glacier Tortoise gets +5/-5 until end of turn. Activate only once each turn.

Glitch {3}{W} (Remove one [restriction] for each time you pay the glitch cost.)
Exile target nonland permanent. [Return it to the battlefield under its owner's control at the beginning of the next end step.]

Blossoming Sands enters tapped.
When Blossoming Sands enters, you gain 1 life.
{T}: Add {G} or {W}.

Converge — Destroy up to X target artifacts or enchantments, where X is the number of colors of mana spent to cast Bury the Past.