msem-instigator

Equipped creature gets +2/+2.
Whenever equipped creature attacks, until your next turn, up to one target creature can't attack or block and its activated abilities can't be activated.
Equip {2}

Choose one —
• Meteor Fall deals 4 damage to each creature and each planeswalker.
• Meteor Fall deals 8 damage to target creature or planeswalker.

Deathtouch, lifelink
Improve {1}{W/B} ({1}{W/B}: Put a +1/+1 counter on this creature. This costs {1} more to activate for each +1/+1 counter on it. Improve only as a sorcery.)
{4}: Target creature gains deathtouch and lifelink until end of turn. Activate only during a player's first main phase.

{T}: Add {C}.
{2}, {T}: Add {C} for each Desert you control.

Target creature gets +2/+0 and gains trample and haste until end of turn.
Cycling {2} ({2}, Discard this card: Draw a card.)

Flash
Enchant creature
Enchanted creature gets +1/+1 and has hexproof.

{W}, {T}: Target creature doesn't untap during its controller's next untap step.

Tempting Realms enters tapped unless you control two or more other lands.
{T}: Add {B}.
{T}, Pay 1 life: Add {U} or {R}.

Enchant creature you control
When Heliod's Benefaction enters, scry 2.
Enchanted creature gets +1/+1 and has lifelink.

You may exchange a creature you both own and control with a creature card in your hand that has the same mana value.
Flashback {1}{G} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

When Kahroba Patrol dies, you may search your library for a basic land or Satrapy card, reveal it, put it into your hand, then shuffle.

Choose one —
• Target creature you control deals damage equal to its power to each of up to two other target creatures.
• Create a 5/5 green Treefolk creature token with reach.

Ward—Sacrifice three permanents.
At the beginning of your end step, put a desperation counter on End of History. Draw two cards for each counter on it, then exile the top three cards of your library for each counter on it.

Flash
When Enlightened Lizard enters, counter target noncreature spell.

When Viridian Townships enters, create two Idol tokens. (They're artifacts with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)
{2}, Sacrifice an Idol: Draw a card.
{2}, Sacrifice an Idol: You gain 3 life.

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.)
When Painwield Explorer dies, it deals damage equal to its power to target player or planeswalker.

Haste
Shimmer (Whenever this creature attacks, create a tapped and attacking token that's a copy of it. Exile the token at the beginning of the end step.)

{T}, Pay 1 life: Add {R} or {G}.
{2}, {T}, Sacrifice Capital Towpath and another permanent: Draw a card. Activate only during your turn.

When Customs Lookout enters, each player draws a card, then discards a card.
Whenever an opponent casts a spell with the same name as a card they own in exile or in their graveyard, you may scry 2.

Look at the top two cards of your library. Put one of them into your hand and the rest into your graveyard.
Rerun (If you cast this from your hand, exile it as it resolves. Whenever a creature you control dies, you may cast this card from exile without paying its mana cost.)

Create a token that's a copy of target creature.
Agonize (You may cast this card from your graveyard by putting a -1/-1 counter on a creature you control in addition to paying its other costs. Then exile this card.)

Return X target creature cards with mana value 3 or less from your graveyard to the battlefield, then choose one of them and exile the rest.

When Junktrawler enters, create a tapped colorless Powercell artifact token with “{T}: Add {C}.”
Tap another untapped artifact you control: Junktrawler gets +1/+1 until end of turn.

Fahrib's Tongue can't be blocked by creatures with two or more creature types.
Whenever Fahrib's Tongue deals combat damage to a player, that player loses 1 life for each creature that dealt damage to them this turn.

Flash
Flying
When Cobblespook enters, tap target artifact or creature an opponent controls.