msem-instigator

Enchant creature
Enchanted creature gets -3/-3.

Target creature gets +1/+0 and gains first strike until end of turn.
Cycling {2} ({2}, Discard this card: Draw a card.)

Assault {1}{R} (Whenever this attacks, if it has no +1/+1 counters on it, you may pay its assault cost to put a +1/+1 counter on it.)
When Urudi Warlord assaults, it gains first strike until end of turn.

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

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.

Alpha (You may have this creature enter with a +1/+1 counter on it. If you do, it becomes alpha and can only attack alone.)
Whenever a creature you control attacks alone, untap all lands you control.

Whenever a creature dies, put a +1/+1 counter on each creature you control with power less than it.
{3}{G}, Sacrifice a creature: Draw cards equal to the sacrificed creature's power.

When Irrigation Trawler enters, reveal the top card of your library. If that card was a land card, put that card into your hand. Otherwise, create a colorless artifact token named Lotus Petal with “{T}, Sacrifice this artifact: Add one mana of any color.”

Scry X. (Then exile this card. You may cast the creature later from exile.)

Put a +1/+1 counter on up to one target creature.
Draw a card.

When Ritesinger Shaman dies, each player discards a card.

Flash
When Leafdown Ambusher enters, create three colorless artifact tokens named Arrow. They have “{T}, Tap an untapped creature you control, Sacrifice this permanent: The tapped creature fights target creature you don't control. Activate only as a sorcery unless this permanent entered this turn.”

Cast this spell only if each graveyard has a creature card in it.
Each player puts a creature card in their graveyard of an opponent's choice onto the battlefield.

Whenever Highland Elk deals damage to a creature, return that creature to its owner's hand (if it's still on the battlefield.)

Whenever you cast a spell with mana value 4 or greater, catalyze. (The next spell you cast this turn costs {1} less to cast.)

Look at the top two cards of your library. Put one of them into your hand and the other on the bottom of your library.

Draw a card, then draw cards equal to the number of cards named Sea Cache in your graveyard.

Destroy target artifact or enchantment. Purge. (Exile two cards that share a type from graveyards. If you do, draw a card.)

Destroy target attacking or blocking creature.

Deathtouch
Art of war — At the beginning of your end step, if Disciple of Hashiro dealt damage to an opponent this turn, put a +1/+1 counter on it.

Flying, haste
Whenever Cheng attacks, look at the top six cards of your library. You may reveal a creature card from among them and put it into your hand. If it's a Dragon, put it onto the battlefield tapped and attacking instead. Put the rest on the bottom of your library in a random order.

Target creature gains hexproof and indestructible until end of turn. If it's legendary, put a +1/+1 counter on it.

Flying
Whenever Novaheart Dragon enters or attacks, you may take an extra turn after this one. If you do, you lose the game at the beginning of that turn's end step.

When Driver of Hordes enters, create a tapped 2/2 black Zombie creature token.
Unearth {3}{B} ({3}{B}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the end step or if it would leave the battlefield. Unearth only as a sorcery.)

Choose one —
• Draw two cards, then discard a card.
• Counter target spell unless its controller pays {3}.