msem-instigator

Flash
If a card or token would be put into an opponent's graveyard from anywhere, exile it instead.

Unassuming Waif can't be blocked.
Unassuming Waif gets +1/+0 for each other Warrior you control.

Choose one —
• Counter target spell unless its controller pays {2}.
• Tap target creature. It doesn't untap during its controller's next untap step.

You may pay {W} and tap an untapped Monk you control rather than pay this spell's mana cost.
The next 3 damage that would be dealt to you and/or permanents you control this turn is dealt to any target instead.

Enchant creature
Enchanted creature can't be blocked.
{1}{G}: Enchanted creature gets +1/+1 and gains hexproof until end of turn.

When Unbound Expanse enters, if an opponent controls more lands than you, create a Plains token. (It's a basic land with “{T}: Add {W}.”)
{1}{W}, Sacrifice Unbound Expanse: Exile each nonland permanent you control, then return those cards to the battlefield under your control.

Escalate—Return another spell you control to its owner's hand. (Pay this cost for each mode chosen beyond the first.)
Choose one or both —
• Draw a card.
• Draw a card.

Target creature gets +1/+0 and gains indestructible until end of turn. Draw a card if you control an Angel, Demon, Faerie or Spirit.

Whenever Unbudging Badger attacks, if its power is 4 or greater, it gains trample until end of turn.

Search your library for a permanent card with mana value X or less, reveal it, put it into your hand, then shuffle.

Look at the top two cards of your library. Put one of them into your hand, then you may have any number of players each mill three cards.

Enchant land you control
Whenever enchanted land is tapped for mana, it produces an additional mana of that type.
{1}{G}, Sacrifice Under Untamed Skies: Destroy target creature with flying.

{T}, Sacrifice a permanent: Investigate. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)

Slipstream (This creature can't be blocked as long as only creatures with slipstream are attacking.)

Up to one target creature gets -2/-2 until end of turn. Put a +1/+1 counter on up to one target creature you control.

When Undermarket Favors enters, target player discards a card, then mills four cards.
{1}, Sacrifice Undermarket Favors: Draw a card.

{T}, Pay 1 life: Add one mana of any color that a land an opponent controls could produce.

Vigilance
Whenever Underpass Sentinel enters or attacks, you may put a +1/+1 counter on another target creature you control without one.
Sacrifice Underpass Sentinel: Embattled creatures you control gain hexproof and indestructible until end of turn. (A creature is embattled if it has a counter on it or a permanent you control attached to it.)

At the beginning of your upkeep, reveal the top card of your library. If it has the same name as a card in your graveyard, put the revealed card into your hand. Otherwise, put it into your graveyard.

Create a 2/2 black Zombie creature token, then sacrifice a creature.

Return up to two target creature cards from your graveyard to your hand. You lose 2 life.

Exile target nonland permanent if its mana value is less than or equal to the number of creatures you control.
Lifecycle {3} ({3}, Discard this card: Create two tapped 1/1 colorless Elemental creature tokens.)

Ungoverned Sneak can't be blocked by creatures with greater power.
Attain {3}{U} ({3}{U}: Transform this. Spend at least three colors of mana to activate this, and only as a sorcery.)

At the beginning of your upkeep, you may create a Treasure token. If you do, an opponent of your choice creates a tapped Treasure token.

As an additional cost to cast this spell, exile X cards from your graveyard.
Create X tapped 2/2 black Zombie creature tokens.