Ornithopter

Bird Maiden

Creature — Human Bird (1/2)

Flying

Phantom Monster

Creature — Illusion (3/3)

Flying

Scryb Sprites

Creature — Faerie (1/1)

Flying

Clockwork Avian

Artifact Creature — Bird (0/4)

Flying
Clockwork Avian enters the battlefield with four +1/+0 counters on it.
At end of combat, if Clockwork Avian attacked or blocked this combat, remove a +1/+0 counter from it.
, : Put up to X +1/+0 counters on Clockwork Avian. This ability can't cause the total number of +1/+0 counters on Clockwork Avian to be greater than four. Activate only during your upkeep.

Dancing Scimitar

Artifact Creature — Spirit (1/5)

Flying (This creature can't be blocked except by creatures with flying or reach.)

Grapeshot Catapult

Artifact Creature — Construct (2/3)

: Grapeshot Catapult deals 1 damage to target creature with flying.

Primal Clay

Artifact Creature — Shapeshifter (0/0)

As Primal Clay enters the battlefield, it becomes your choice of a 3/3 artifact creature, a 2/2 artifact creature with flying, or a 1/6 Wall artifact creature with defender in addition to its other types. (A creature with defender can't attack.)

Tetravus

Artifact Creature — Construct (1/1)

Flying
Tetravus enters the battlefield with three +1/+1 counters on it.
At the beginning of your upkeep, you may remove any number of +1/+1 counters from Tetravus. If you do, create that many 1/1 colorless Tetravite artifact creature tokens. They each have flying and "This creature can't be enchanted."
At the beginning of your upkeep, you may exile any number of tokens created with Tetravus. If you do, put that many +1/+1 counters on Tetravus.

Urza's Avenger

Artifact Creature — Shapeshifter (4/4)

: Urza's Avenger gets -1/-1 and gains your choice of banding, flying, first strike, or trample until end of turn. (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding you control are blocking or being blocked by a creature, you divide that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.)

Battering Ram

Artifact Creature — Construct (1/1)

At the beginning of combat on your turn, Battering Ram gains banding until end of combat. (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding you control are being blocked by a creature, you divide that creature's combat damage, not its controller, among any of the creatures it's blocking.)
Whenever Battering Ram becomes blocked by a Wall, destroy that Wall at end of combat.

Brass Man

Artifact Creature — Construct (1/3)

Brass Man doesn't untap during your untap step.
At the beginning of your upkeep, you may pay . If you do, untap Brass Man.

Clay Statue

Artifact Creature — Golem (3/1)

: Regenerate Clay Statue.

Clockwork Beast

Artifact Creature — Beast (0/4)

Clockwork Beast enters the battlefield with seven +1/+0 counters on it.
At end of combat, if Clockwork Beast attacked or blocked this combat, remove a +1/+0 counter from it.
, : Put up to X +1/+0 counters on Clockwork Beast. This ability can't cause the total number of +1/+0 counters on Clockwork Beast to be greater than seven. Activate only during your upkeep.

Colossus of Sardia

Artifact Creature — Golem (9/9)

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)
Colossus of Sardia doesn't untap during your untap step.
: Untap Colossus of Sardia. Activate only during your upkeep.

Diabolic Machine

Artifact Creature — Construct (4/4)

: Regenerate Diabolic Machine.

Dragon Engine

Artifact Creature — Construct (1/3)

: Dragon Engine gets +1/+0 until end of turn.

Mishra's War Machine

Artifact Creature — Juggernaut (5/5)

Banding (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding you control are blocking or being blocked by a creature, you divide that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.)
At the beginning of your upkeep, Mishra's War Machine deals 3 damage to you unless you discard a card. If Mishra's War Machine deals damage to you this way, tap it.

Obsianus Golem

Artifact Creature — Golem (4/6)

Onulet

Artifact Creature — Construct (2/2)

When Onulet dies, you gain 2 life.

Shapeshifter

Artifact Creature — Shapeshifter (0/7)

As Shapeshifter enters the battlefield, choose a number between 0 and 7.
At the beginning of your upkeep, you may choose a number between 0 and 7.
Shapeshifter's power is equal to the last chosen number and its toughness is equal to 7 minus that number.