msem-instigator

Choose one —
• Destroy target artifact.
• Destroy target enchantment.
• Tap target creature and put two stun counters on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)

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

Whenever a land you control enters, 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, you may have an opponent investigate. If you don't, it enters 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 you control.

Whenever Alrathan Scholar deals combat damage to a player or planeswalker, draw a card.
{2}{U}: Target creature gains flying until end of turn.

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

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

When Ancient Tablet enters, 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, 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, investigate. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)
{2}, {T}, Sacrifice a Clue: Draw two cards, then discard a card.

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

Flying, lifelink
Whenever Blackhearted Sphinx attacks, you may pay 3 life. If you do, draw a card.

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

Align X (Choose modes with total ★ less than or equal to X. You may choose modes multiple times.)
• ★ — Bloodstained Calamity deals 1 damage to each creature, player, and planeswalker.
• ★★ — Return target instant or sorcery card from your graveyard to your hand. Exile Bloodstained Calamity.
• ★★★★★ — Bloodstained Calamity deals 10 damage to any target.

As Calamity Apparition enters, 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, it deals 4 damage to up to one target creature or planeswalker.

Whenever Calamity Scholar attacks, if you control an artifact, put a +1/+1 counter on it.

Vigilance, reach
Whenever Cave Spider blocks a creature with flying, Cave Spider gets +2/+0 until end of turn.

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

Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.)

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