msem-instigator

When Overwhelming Paperwork enters or is put into a graveyard from the battlefield, return up to one target creature to its owner's hand.
{3}{U}{U}: Sacrifice Overwhelming Paperwork. Activate only as a sorcery.

Flying
When Owl of the Seven Stars enters, scry 2.

When P-3 Ambusher enters, you may sacrifice a creature or discard a creature card. If you do, draw a card.

Flash
Flying
When P05 Suppressor enters, create a Function token with “Tap target creature. Put a stun counter on it.” (It's an enchantment. As you cast an instant or sorcery spell, sacrifice any number of Functions to add their effects to that spell.)

Enchant creature
Enchanted creature can't attack or block.

Enchant creature
Prevent all damage that would be dealt by enchanted creature.

Ferocious — When Pack Familiar dies, if you control a creature with power 4 or greater, create two 2/2 green Wolf creature tokens.

Improve {G} ({G}: Put a +1/+1 counter on this creature. This costs {1} more to activate for each +1/+1 counter on it. Improve only as a sorcery.)
When Pack Huntress enters, create a 2/2 green Wolf creature token.

Lifelink
When Pact Equivocator enters, you lose 2 life and draw a card.

Enchant creature
When Paid in Blood enters, create a Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)
Enchanted creature gets +1/+1 and has lifelink.

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

{T}: Target player loses 1 life.
Whenever you cast a spell from your graveyard, untap Paincaller.

You draw two cards, lose 2 life, then mill two cards.

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

Target player sacrifices an enchantment. You gain 4 life.

{T}: Add {C}.
{1}, {T}: 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.

Cadence (Whenever you cast a spell, if its mana value is greater than this creature's power, put a +1/+1 counter on this creature.)
When Painwield Explorer dies, it deals damage equal to its power to target player or planeswalker.

Vigilance
When Paired Pathfinders enters, if three or more colors were spent to cast it, create a 1/1 colorless Servo artifact creature token.

{2/W}, {T}: Tap target creature.

Flying

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

Concord — When Palace Servant enters, if there are four or more card types among permanents you control, create two 1/1 white Merfolk creature tokens.

When Palace Vanguard enters, choose one —
• Create a 1/1 blue Bird creature token with flying.
• Create a 2/2 white Cat creature token.