Kaladesh

Aviary Mechanic | Creature | Dwarf Artificer | When Aviary Mechanic enters the battlefield, you may return another permanent you control to its owner's hand. | Mark Zug

Eddytrail Hawk | Creature | Bird | Flying When Eddytrail Hawk enters the battlefield, you get {E}{E} (two energy counters). Whenever Eddytrail Hawk attacks, you may pay {E}. If you do, another target attacking creature gains flying until end of turn. | James Paick

Ninth Bridge Patrol | Creature | Dwarf Soldier | Whenever another creature you control leaves the battlefield, put a +1/+1 counter on Ninth Bridge Patrol. | Ryan Alexander Lee

Aether Theorist | Creature | Vedalken Rogue | When Aether Theorist enters the battlefield, you get {E}{E}{E} (three energy counters). {T}, Pay {E}: Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.) | Lucas Graciano

Curio Vendor | Creature | Vedalken | | Igor Kieryluk

Dhund Operative | Creature | Human Rogue | As long as you control an artifact, Dhund Operative gets +1/+0 and has deathtouch. | Magali Villeneuve

Thriving Rats | Creature | Rat | When Thriving Rats enters the battlefield, you get {E}{E} (two energy counters). Whenever Thriving Rats attacks, you may pay {E}{E}. If you do, put a +1/+1 counter on it. | Tom Babbey

Reckless Fireweaver | Creature | Human Artificer | Whenever an artifact enters the battlefield under your control, Reckless Fireweaver deals 1 damage to each opponent. | Deruchenko Alexander

Thriving Grubs | Creature | Gremlin | When Thriving Grubs enters the battlefield, you get {E}{E} (two energy counters). Whenever Thriving Grubs attacks, you may pay {E}{E}. If you do, put a +1/+1 counter on it. | Steve Prescott

Kujar Seedsculptor | Creature | Elf Druid | When Kujar Seedsculptor enters the battlefield, put a +1/+1 counter on target creature you control. | Anna Steinbauer

Sage of Shaila's Claim | Creature | Elf Druid | When Sage of Shaila's Claim enters the battlefield, you get {E}{E}{E} (three energy counters). | Howard Lyon

Consulate Skygate | Artifact Creature | Wall | Defender Reach (This creature can block creatures with flying.) | John Avon

Eager Construct | Artifact Creature | Construct | When Eager Construct enters the battlefield, each player may scry 1. (To scry 1, look at the top card of your library, then you may put that card on the bottom of your library.) | Craig J Spearing

Narnam Cobra | Artifact Creature | Snake | {G}: Narnam Cobra gains deathtouch until end of turn. (Any amount of damage it deals to a creature is enough to destroy it.) | Christopher Burdett