msem-instigator

Whenever you cast an instant or sorcery spell, choose a counter on target permanent or player. You may put an additional counter of that kind on that permanent or player.

Flourishing Forest enters tapped.
As Flourishing Forest enters, choose a basic land type.
Flourishing Forest is the chosen type in addition to its other types.

Flying
Whenever you cast your first noncreature spell each turn, create a Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)

{1}, Discard a card: Painted Watcher gets +1/+1 and becomes the color of your choice until end of turn.

{1}, Sacrifice a creature: Put a +1/+1 counter on Ever-Wandering Pilgrim.
Surpass {5}{B} ({5}{B}: Transform this creature. This costs {1} less to activate for each counter on it. Activate only as a sorcery.)

Flying, haste
You may reveal each card you draw as you draw it. Whenever you reveal a creature card with mana value 1 or less this way, create a token that's a copy of it. That copy gains haste until end of turn.

Gain control of target artifact or creature until end of turn. Untap it. It gains haste until end of turn.

Decayed Bedchamber enters tapped.
When Decayed Bedchamber enters, look at the top card of your library. You may put it into your graveyard.
{T}: Add {B} or {G}.

Dominance — When Mammoth Crab enters, draw a card if you control the creature with the greatest power or tied for the greatest power.

First strike
Sacrifice Echo Striker: Target creature gains double strike until end of turn.

Whenever Dodgy Infant becomes the target of a spell, you may change the target to another creature you control.

Trample

Whenever Heedless Astronaut attacks, it gets +2/+0 and gains indestructible until end of turn.

Enchant player
Whenever enchanted player casts a spell, they reveal cards from the top of their library until they reveal a card that shares a type with that spell, then puts all cards revealed this way into their graveyard.

Choose one —
• Exile all creature tokens.
• Exile target creature or planeswalker.
• Each opponent exiles a card from their hand and loses 2 life.

Breach (Whenever this deals combat damage to a player, you may have it become an Aura Curse until your next turn. Attach it to that player.)
Whenever a cursed opponent attacks, you may draw a card.

Enchant land
Enchanted land loses all land types, has “{T}: Add {C}”, and loses all other abilities.

Haste
When Caravan Engulfer enters, creatures you don't control can't block this turn.

Search your library for a planeswalker card, exile it with two loyalty counters on it, then shuffle. If that card has mana value 4 or less, you may activate one of its loyalty abilities. Then put that card into your hand.

Prevent all damage that would be dealt to creatures and to you this turn.

Creatures with power less than Seer of the Hunt's power can't block it.

Siphon (Each -1/-1 counter you put on your creatures up to their remaining toughness while casting this pays for {1}.)
Search your library for up to two Forest cards, reveal those cards, put one onto the battlefield tapped and the other into your hand, then shuffle.

{T}: Add {C}.
{T}, Reappropriate: Add {G} or {W}. (Exile exactly two cards from your hand and/or graveyard.)

Menace
Sabotage — Whenever an opponent or permanent an opponent controls becomes the target of a spell you control, each opponent discards a card.

As an additional cost to cast this spell, discard a card.
Draw two cards.