msem-instigator

Return up to three target land cards from your graveyard to your hand.
Coalesce {6}{G} (You may cast this from your graveyard for {6}{G}. If you do, put it onto the battlefield as a Horror creature after it resolves. Exile it if it would leave the battlefield or not resolve.)

Counter target spell unless its controller pays {X}. Scry 2.

Draw a card.
Leitmotif (If you cast this spell from your hand, exile it as it resolves. When you next cast a spell that shares a color with this card, you may cast this from exile without paying its mana cost.)

Choose one, then choose another for each card named Unsuspecting in your graveyard.
• You may return a permanent you control to its owner's hand.
• You may put an artifact, creature, or land card with mana value 2 or less from your hand onto the battlefield.
• Untap up to three target permanents.
• You gain 4 life.

Activated abilities you activate cost {1} less to activate. This effect can't reduce the mana in that cost to less than one mana.
Attain {5}{U} ({5}{U}: Transform this. Spend at least three colors of mana to activate this, and only as a sorcery.)

When Masha's Lightbound becomes tapped for the first time each turn, untap Masha's Lightbound and each other creature you control.
{W}, {T}: Exile target card from a graveyard.

Reach (This creature can block creatures with flying.)

Whenever Barricade Watch is dealt damage, put a +1/+1 counter on it. (It must survive the damage to get the counter.)

Knight of the Olive Orchard can't be blocked by more than one creature.

({T}: Add {R} or {G}.)
Flourishing Crevasse enters the battlefield tapped unless you control a basic Mountain or a basic Forest.

Return target Actor or enchantment card from your graveyard to the battlefield.

Whenever a creature enters the battlefield under your control, it gets +2/+1 until end of turn.

Creatures you control get +2/+0 until end of turn. Creatures target player controls gain winnow until end of turn. (Damage dealt to it also causes its controller to lose that much life.)

Create three 1/1 green Insect creature tokens, then put a +1/+1 counter on each of them.

Create a 2/2 black Zombie creature token.
Tether (Then if you cast this from your hand, you may exile it tethered to a creature you control. When it dies, you may cast this from exile without paying its mana cost.)

(As this Discovery enters and after your draw step, add a progress counter. Stop after you've discovered.)
I, II — Return target creature card from your graveyard to your hand.
Discovery — {2}{B}, Sacrifice a creature: Each opponent loses 2 life and you gain 2 life.

Trample

As an additional cost to cast this spell, discard a land card.
Exile the top two cards of your library. Until end of turn, you may play those cards.

Modular Mercenary gets +1/+0 and has first strike as long as you control a creature with a +1/+1 counter on it.

Flash
Embellish {5}{U} (If you cast this spell for {5}{U}, create a 1/1 blue Thopter artifact creature token with flying when it enters the battlefield.)
Whenever Vectis Entrancer or another artifact enters the battlefield under your control, tap target creature an opponent controls. It loses all abilities until end of turn.

Stratospheric Bombardment deals X damage to any target and you gain that much life.

Choose one—
• Destroy target land.
• Destroy target creature with flying.

Destroy target artifact or land.
Kindle 2—{R}, Sacrifice an artifact or land. ({R}, Sacrifice an artifact or land, Exile this card from your graveyard: Create two 1/1 colorless Elemental creature tokens. Kindle only as a sorcery.)

Trample
When Arpechian Yatte enters the battlefield, put a +1/+1 counter on each other creature you control.
Whenever another creature enters the battlefield under your control, put a +1/+1 counter on Arpechian Yatte.