msem-instigator

Choose one —
• Destroy target artifact.
• Destroy target enchantment.
• Counter target spell unless its controller pays {1}.

Aeren Hellfire deals 4 damage to any target.
You may draw a card. If you do, discard a card.

Whenever a land enters the battlefield under your control, untap Ageless Wanderer.
{1}, {T}: Add one mana of any color.

This spell costs {1} less to cast for each artifact you control.
Draw two cards.

As Alratha, Pearl of the Sand Sea enters the battlefield, you may have an opponent investigate. If you don't, it enters the battlefield tapped.
{T}: Add {U}.
{1}{U}, {T}: Investigate.

Double strike
Whenever an opponent casts a spell that targets you or a spell or permanent you control, Alrathan Outcast deals damage equal to twice its power to that player.
Alrathan Outcast gets +1/+1 for each Aura and Equipment attached to it.

Whenever Alrathan Scholar deals combat damage to a player, investigate.
{U}: Alrathan Scholar gains flying until end of turn.

Flying, prowess
Whenever an artifact enters the battlefield under your control, you may draw a card. If you do, discard a card.

As Ancestral Facsimile enters the battlefield, choose reality or illusion.
Foresight — Whenever you draw your second card each turn,
• Reality — Tap target creature.
• Illusion — Scry 2.

When Ancient Tablet enters the battlefield, scry 2.
{2}, Sacrifice Ancient Tablet: You may shuffle any number of target cards from your graveyard into your library. Draw a card.

As Approach the Dark Tomb enters the battlefield, choose life or death.
• Life — Whenever you cast a creature spell, you may pay 1 life. If you do, draw a card.
• Death — Whenever a creature you control dies, you may pay 1 life. If you do, draw a card.

As long as Armed Vendor is enchanted or equipped, it gets +1/+0 and has menace.

When Azure Archaeologist enters the battlefield, investigate.
{2}, {T}, Sacrifice a Clue: Draw two cards, then discard a card.

Equipped creature gets +3/+0 and has vigilance.
Equip {3}

Flying, lifelink
{B}, Pay 2 life: Investigate. Activate only as a sorcery and only once each turn.

{2}, {T}, Sacrifice a creature: You draw a card and lose 2 life.
{1}, {T}, Exile a creature card from your graveyard: You gain 2 life.

Align X
• V — Bloodstained Calamity deals 1 damage to each creature, player, and planeswalker.
• VV — Return target instant or sorcery card from your graveyard to your hand. Exile Bloodstained Calamity.
• VVVVV— Bloodstained Calamity deals 10 damage to any target.

As Calamity Apparition enters the battlefield, choose fade or linger.
When Calamity Apparition dies,
• Fade — You gain 2 life and scry 2.
• Linger — Put a +1/+1 counter on target creature you control.

Flying
When Calamity Harbinger enters the battlefield, it deals 4 damage to up to one target creature.

Whenever Calamity Scholar attacks, it gets +1/+0 until end of turn for each artifact you control.

Reach
Whenever Cave Spider blocks a creature with flying, Cave Spider gets +1/+0 until end of turn.

Trample
{1}{G}, Exile a card from your graveyard: Target creature gains trample until end of turn.

Mentor

[+2]: You may sacrifice a permanent or discard a card. If you do, draw a card.
[–X]: Return target creature card with mana value X or less from your graveyard to the battlefield.
[–8]: You get an emblem with “Whenever a permanent you control dies, return a permanent card with lesser mana value from your graveyard to the battlefield.”

Counter target spell.
Investigate.