Spireside Infiltrator

Reckless Fireweaver

Creature — Human Artificer (1/3)

Whenever an artifact enters the battlefield under your control, Reckless Fireweaver deals 1 damage to each opponent.

Aethertorch Renegade

Creature — Human Rogue (1/2)

When Aethertorch Renegade enters the battlefield, you get (four energy counters).
, Pay : Aethertorch Renegade deals 1 damage to target creature.
, Pay : Aethertorch Renegade deals 6 damage to target player or planeswalker.

Renegade Firebrand

Creature — Human Warrior (3/2)

As long as you control a Chandra planeswalker, Renegade Firebrand gets +1/+0 and has first strike. (It deals combat damage before creatures without first strike.)

Depala, Pilot Exemplar

Legendary Creature — Dwarf Pilot (3/3)

Other Dwarves you control get +1/+1.
Each Vehicle you control gets +1/+1 as long as it's a creature.
Whenever Depala, Pilot Exemplar becomes tapped, you may pay . If you do, reveal the top X cards of your library, put all Dwarf and Vehicle cards from among them into your hand, then put the rest on the bottom of your library in a random order.

Maulfist Doorbuster

Creature — Human Warrior (4/2)

When Maulfist Doorbuster enters the battlefield, you get (two energy counters).
Whenever Maulfist Doorbuster attacks, you may pay . If you do, target creature can't block this turn.

Quicksmith Genius

Creature — Human Artificer (3/2)

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

Salivating Gremlins

Creature — Gremlin (2/3)

Whenever an artifact enters the battlefield under your control, Salivating Gremlins gets +2/+0 and gains trample until end of turn.

Speedway Fanatic

Creature — Human Pilot (2/1)

Haste
Whenever Speedway Fanatic crews a Vehicle, that Vehicle gains haste until end of turn.

Territorial Gorger

Creature — Gremlin (2/2)

Trample
Whenever you get one or more (energy counters), Territorial Gorger gets +2/+2 until end of turn.

Thriving Grubs

Creature — Gremlin (2/1)

When Thriving Grubs enters the battlefield, you get (two energy counters).
Whenever Thriving Grubs attacks, you may pay . If you do, put a +1/+1 counter on it.

Brazen Scourge

Creature — Gremlin (3/3)

Haste

Lathnu Hellion

Creature — Hellion (4/4)

Haste
When Lathnu Hellion enters the battlefield, you get (two energy counters).
At the beginning of your end step, sacrifice Lathnu Hellion unless you pay .

Pia Nalaar

Legendary Creature — Human Artificer (2/2)

When Pia Nalaar enters the battlefield, create a 1/1 colorless Thopter artifact creature token with flying.
: Target artifact creature gets +1/+0 until end of turn.
, Sacrifice an artifact: Target creature can't block this turn.

Skyship Stalker

Creature — Dragon (3/3)

Flying
: Skyship Stalker gets +1/+0 until end of turn.
: Skyship Stalker gains first strike until end of turn.
: Skyship Stalker gains haste until end of turn.

Spontaneous Artist

Creature — Human Rogue (3/3)

When Spontaneous Artist enters the battlefield, you get (an energy counter).
Pay : Target creature gains haste until end of turn.

Terror of the Fairgrounds

Creature — Gremlin (5/2)

Veteran Motorist

Creature — Dwarf Pilot (3/1)

When Veteran Motorist enters the battlefield, scry 2.
Whenever Veteran Motorist crews a Vehicle, that Vehicle gets +1/+1 until end of turn.

Voltaic Brawler

Creature — Human Warrior (3/2)

When Voltaic Brawler enters the battlefield, you get (two energy counters).
Whenever Voltaic Brawler attacks, you may pay . If you do, it gets +1/+1 and gains trample until end of turn.

Whirler Virtuoso

Creature — Vedalken Artificer (2/3)

When Whirler Virtuoso enters the battlefield, you get (three energy counters).
Pay : Create a 1/1 colorless Thopter artifact creature token with flying.

Combustible Gearhulk

Artifact Creature — Construct (6/6)

First strike
When Combustible Gearhulk enters the battlefield, target opponent may have you draw three cards. If the player doesn't, you mill three cards, then Combustible Gearhulk deals damage to that player equal to the total mana value of those cards.