msem-instigator

Creatures you control gain haste and trample until end of turn.
Draw a card.

Obscoriate deals 4 damage to target creature or planeswalker. The next time that permanent would die this turn, instead put a basalt counter on it, it becomes a Mountain land named Charred Remains, loses all other card types, and gains “At the beginning of your upkeep, Charred Remains deals 1 damage to you.” (It has “{T}: Add {R}” and loses abilities it already had.)

Flash
When Threadspinner enters, untap each enchanted permanent you control. Enchanted creatures you control get +1/+1 until end of turn.

Flash
When this creature enters, look at the top six cards of your library. You may reveal an instant card or card with flash from among them and put it into your hand. Put the rest on the bottom in a random order.

({T}: Add {U} or {R}.)
Frostfire Geysers enters tapped unless you control a basic Island or a basic Mountain.

Enchant creature (Target a creature as you cast this. This card enters attached to that creature.)
Enchanted creature gets +1/+0.
Whenever enchanted creature deals combat damage to a player, you may draw a card.

Head on Collision deals 2 damage to any target.
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.)

Flying
Menagerie — At the beginning of combat on your turn, if there are five or more creature types among creatures you control, create a 1/1 black Insect Spirit creature token with flying and you gain 1 life.

Equipped creature gets +1/+1.
Whenever equipped creature attacks, tap up to one target creature.
Equip {1}

Trample
Seasoned Adventurer enters with two +1/+1 counters if you control seven or more lands.

Destroy all creatures. If a Reflection would be destroyed this way, its owner shuffles it into their library instead.

Foresight — Whenever you draw your second card each turn, Haggler's Hound gets +1/+1 and can't be blocked by creatures with power 2 or less until end of turn.

{T}: Add {C}.
{T}, Exile two cards from your graveyard: Add {R} or {W}.

Whenever a land you control becomes a creature, put a +1/+1 counter on it.
{2}{G}{U}: Target land you control becomes a 3/3 Elemental creature in addition to its other types until end of turn.

Scry 3, then reveal the top card of your library. If it's a land card, put it onto the battlefield. Otherwise, distribute X +1/+1 counters among any number of target creatures you control, where X is that card's mana value.

When Trainer of the Abyss dies, create a 1/1 black Demon Hound creature token with deathtouch.

Heretic (Whenever you cast a spell that doesn't share a color with this creature, it gets +1/+1 until end of turn.)
Discard a card: Abominable Mongrel gets +1/+1 and becomes the color of your choice until end of turn.

Flourishing Lowlands enters tapped.
{T}: Add {G}.
Desertcycling {1}{G} ({1}{G}, Discard this card: Search your library for a Desert card, reveal it, and put it into your hand, then shuffle.)

Lifelink
Converge — When Adapted Explorer enters, it deals X damage to up to one target tapped creature, where X is the number of colors of mana spent to cast it.

Menace
Whenever Lieshi Pariah deals combat damage, you lose that much life unless it's in a pack. (Two or more creatures you control with equal power are in a pack.)

When Verdant Curtain Mascot enters, choose one —
• You gain 2 life.
• Proliferate. (Choose any number of permanents and/or players with counters on them, then give each another counter of each kind already there.)

Attacking creatures get -3/-0 until end of turn.

Whenever Bygone Wreck deals combat damage to a player, you may sacrifice it. If you do, create five Treasure tokens.
Crew 1 (Tap any number of creatures you control with total power 1 or greater: This Vehicle becomes an artifact creature until end of turn.)

When Scrapgear Contraption dies, you may put a +1/+1 counter on target creature.

Dulled Ghost can't be blocked by creatures which have power less than their toughness.
At the beginning of your end step, exile up to one target nonland permanent you control, then return it to the battlefield under its owner's control. If that permanent was tapped, each opponent discards a card.