msem-instigator

Double strike

Enchant creature
Enchanted creature can't block.
Whenever enchanted creature attacks an opponent, it gets +2/+2 until end of turn.

Lifelink
When Bright-Eyed Adventurer enters, rediscover an enchantment card. (Look at the top card of your library. You may reveal it and put it into your hand if it's an enchantment card. Otherwise, put it back or into your graveyard.)

When Kingpin of Nizev enters, create two 1/1 white Soldier creature tokens.
Sacrifice a creature: Each opponent loses 1 life. Surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

{1}{B}, Exile a creature or land card from your graveyard: Return Rotwood Whisper from your graveyard to the battlefield tapped.

Menace
As long as you control exactly one other creature, that creature gets +1/+1 and has menace.

Enchant creature
Enchanted creature gets +1/+1.
Sacrifice Bear Necessities: Enchanted creature gains indestructible until end of turn.

Survivors you control have flying.

{W}, Sacrifice Haunting Bard: Destroy target artifact or enchantment.

When Seishin Smokeshaper enters, create a 2/2 colorless Spirit creature token.
Whenever you cast a noncreature spell, colorless creatures you control get +1/+1 until end of turn.

When Sewer Dweller enters or dies, create a 1/1 black Rat creature token with “This creature can't block.”

Fang Den Jaws enters tapped unless you played it from exile.
{T}: Add {R} or {G}.

Vigilance, trample
Prized Marshcroaker can block an additional creature each combat.

When Leafdown Lookout enters, if you control another Scout, draw a card, then you may put a land card from your hand onto the battlefield tapped.

Whenever equipped creature attacks, exile target nonland permanent until Grab Bag leaves the battlefield.
Whenever equipped creature deals combat damage to a player, put a card exiled with Grab Bag onto the battlefield under your control.
Equip {3}

When Possibility Engine enters, exile the top two cards of your library.
Wanderlust — During each of your turns, if you control four or more differently named lands, you may play a card exiled with Possibility Engine.

Exchange control of all creatures you and target player control until end of turn. Untap those creatures. They gain haste until end of turn.

Enchant player
At the beginning of enchanted player's end step, gain control of a permanent they control.

As an additional cost to cast this spell, discard a card.
Create three 1/1 black Spirit creature tokens with flying.

When Marionette Phantom enters, choose one —
• Draw a card.
• Proliferate. (Choose any number of permanents and/or players with counters on them, then give each another counter of each kind already there.)

When Healing Potion enters, scry 1, then draw a card.
{2}, {T}, Sacrifice Healing Potion: You gain 4 life.

{W}: Target creature gains vigilance until end of turn.

Flying
Hexproof (This creature can't be the target of spells or abilities your opponents control.)

Enchant creature or planeswalker
Enchanted permanent has base power 0 and loses all abilities.

Deathtouch
Whenever a creature dealt damage by Rabid Rodent this turn dies, put a +1/+1 counter on Rabid Rodent.
{2}, Remove a +1/+1 counter from Rabid Rodent: Regenerate Rabid Rodent.