msem-instigator

Archive 3 (As this enters, shuffle the top three cards of your main library into a new face up library. Sacrifice this after the archived library is empty.)
Whenever you draw a card from the archived library, put the top card of your main library on the bottom of the archived library.
{R}: Exchange a card from the archived library with a card from your hand.

Put a +1/+1 counter on target attacking creature.
Draw a card.

When you discard Attack Vector, you may cast it from your graveyard.
Exile the top two cards of your library. Until the end of your next turn, you may play one of those cards.

Enchant creature
As long as you control an untapped creature, enchanted creature can't attack or block.

Flying, vigilance
When Augur of Pathways enters, surveil 1.

Sacrifice a creature: Exile the top card of your library. Until end of turn, you may play that card.

Target creature can't block this turn. (Then exile this card. You may cast the creature later from exile.)

Menace (This creature can't be blocked except by two or more creatures.)
Avatar of Basat can't block.

Reach
{3}{G}: Put a +1/+1 counter on Avaz Sentry.
Surpass {5}{G} ({5}{G}: Transform this creature. This costs {1} less to activate for each counter on it. Activate only as a sorcery.)

Counter target instant or Aura spell that targets a permanent you control.

As an additional cost to cast this spell, exile a red card from your hand.
Destroy target artifact. Awaken to the Skies deals damage to that artifact's controller equal to its mana value.

{R}, {T}: Put a luster counter on Awestone.
{1}{R}, {T}: Add {R} for each luster counter on Awestone.
{2}{R}, {T}: Until end of turn, gain control of target nonland permanent with mana value less than or equal to the number of luster counters on Awestone and it gains haste. Untap that permanent. Activate only during your turn.

Target opponent shuffles a card from their hand into their library.

Satrapies you control have “{2}, {T}, Pay 1 life: Draw a card.”
Satrapycycling {2} ({2}, Discard this card: Search your library for a Satrapy card, reveal it, put it into your hand, then shuffle.)

You may cast target instant card from your graveyard this turn. If a card cast this way would be put into your graveyard, exile it instead.

Target tapped creature gets -3/-3 until end of turn.

Whenever you discard a card, exile that card from your graveyard.
{2}, {T}: Draw a card, then discard a card.
{4}, {T}, Sacrifice Bag of Holding: Return all cards exiled with Bag of Holding to their owner's hand.

Deathtouch
Bahet's Emissary gets +1/+1 as long as you control a white or black permanent.

Double strike
Engage (This creature must be blocked each combat if able.)
{1}{R}: Balanced Blade gets +1/+0 until end of turn.

Flying, deathtouch

Target creature gets +1/+0 and can't be blocked this turn.
Showcase {2}{U} (Then if you cast this for its showcase cost, create a 1/1 red Bard creature token that can't block and exile this. Whenever it attacks, you may cast a free copy of this.)

Whenever equipped creature attacks, it gains deathtouch until end of turn.
Sacrifice Bandit's Dagger: Target player dealt damage by equipped creature this turn reveals their hand. You choose a nonland card from it. That player discards that card.
Equip {2}

Counter target planeswalker spell.
Draw a card.

Haste
Whenever Banished Companion attacks, it deals 2 damage to you.

Exile up to three target cards from graveyards. (Then exile this card. You may cast the creature later from exile.)