msem-instigator

Counter target creature spell unless its controller pays {3}.
Cycling {B} ({B}, Discard this card: Draw a card.)

Flying
Nonartifact permanents entering the battlefield don't cause abilities to trigger.

Artifact spells you cast cost {1} less to cast.

Embellish {4}{W} (If you cast this spell for {4}{W}, create a 1/1 blue Thopter artifact creature token with flying when it enters.)
Equipped creature gets +2/+2.
Whenever an artifact creature you control enters, you may attach Etherium Staff to it.
Equip {2}

When Ethersworn Elite enters, you gain 2 life and create two 1/1 blue Thopter artifact creature tokens with flying.
Cycling {2} ({2}, Discard this card: Draw a card.)

Enchant creature
You control enchanted creature.
Enchanted creature gets +1/+1 and is an artifact in addition to its other types.

Stampede — Whenever Etlan High Priest and a creature with greater power attack, Etlan High Priest gets +1/+1 until end of turn. Then you gain 1 life and scry 1.

Destroy target creature with power equal to its toughness.

Stampede — Whenever Exuberant Hunter and a creature with greater power attack, draw a card.

At the beginning of combat on your turn, gain control of target creature an opponent controls with power less than the greatest power among creatures you control until end of turn. Untap that creature. It gains haste until end of turn.

Look at the top three cards of your library. Put one of them into your hand and the rest into your graveyard.
Tether (Then if you cast this from your hand, you may exile it tethered to a creature you control. When it dies, you may cast this from exile without paying its mana cost.)

Target opponent mills five cards. Then exile a card milled this way. You may cast that card for as long as it remains exiled, and you may spend mana as though it were mana of any color to cast that spell.
Tether (Then if you cast this from your hand, you may exile it tethered to a creature you control. When it dies, you may cast this from exile without paying its mana cost.)

Flying
Whenever another artifact you control enters, Filigree Drake gets +1/+1 until end of turn.

{T}: Add three mana in any combination of colors. Spend this mana only to cast artifact spells or activate abilities of artifacts.

{3}{R}: Target creature can't block this turn.

Deathtouch
When Flesheater Vine enters, you may have it consume. If you do, put a +1/+1 counter on it and you gain 3 life. (To consume, sacrifice another creature or exile a creature card from your graveyard.)

Target creature you control deals damage equal to its power to target creature you don't control. Scry 1.

When Fodder Goblins enters, create a 1/1 red Goblin creature token.

{T}: Each opponent loses 1 life and you gain 1 life.
Whenever you cycle a card or cast a spell with a cycling ability, untap Font of Nefarox.

Forbidding Isle enters tapped unless you control a Swamp.
{T}: Add {U} or {R}.

Civilized — Whenever Founding Hero attacks, if you control an artifact, a creature, and an enchantment, Founding Hero gains double strike until end of turn.

First strike
Stampede — Whenever Frenzied Nacatl and a creature with greater power attack, Frenzied Nacatl gets +2/+0 until end of turn.

Whenever a creature you control dies, put a +1/+1 counter on Funerary Barge.
Crew 1 (Tap any number of creatures you control with total power 1 or greater: This Vehicle becomes an artifact creature until end of turn.)

Create three 1/1 green Saproling creature tokens.