Shapeshifter

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.

Armageddon Clock

Artifact

At the beginning of your upkeep, put a doom counter on Armageddon Clock.
At the beginning of your draw step, Armageddon Clock deals damage equal to the number of doom counters on it to each player.
: Remove a doom counter from Armageddon Clock. Any player may activate this ability but only during any upkeep step.

Naked Singularity

Artifact

Cumulative upkeep (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
If tapped for mana, Plains produce , Islands produce , Swamps produce , Mountains produce , and Forests produce instead of any other type.

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.

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.

Soldevi Golem

Artifact Creature — Golem (5/3)

Soldevi Golem doesn't untap during your untap step.
At the beginning of your upkeep, you may untap target tapped creature an opponent controls. If you do, untap Soldevi Golem.

Demonic Hordes

Creature — Demon (5/5)

: Destroy target land.
At the beginning of your upkeep, unless you pay , tap Demonic Hordes and sacrifice a land of an opponent's choice.

Force of Nature

Creature — Elemental (8/8)

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)
At the beginning of your upkeep, Force of Nature deals 8 damage to you unless you pay .

Minion of Tevesh Szat

Creature — Demon Minion (4/4)

At the beginning of your upkeep, Minion of Tevesh Szat deals 2 damage to you unless you pay .
: Target creature gets +3/-2 until end of turn.

Bronze Horse

Artifact Creature — Horse (4/4)

Trample
As long as you control another creature, prevent all damage that would be dealt to Bronze Horse by spells that target it.

Diabolic Machine

Artifact Creature — Construct (4/4)

: Regenerate Diabolic Machine.

Ebony Rhino

Artifact Creature — Rhino (4/5)

Trample

Obsianus Golem

Artifact Creature — Golem (4/6)

Scarecrow

Artifact Creature — Scarecrow (2/2)

, : Prevent all damage that would be dealt to you this turn by creatures with flying.

Rakalite

Artifact

: Prevent the next 1 damage that would be dealt to any target this turn. Return Rakalite to its owner's hand at the beginning of the next end step.

Celestial Sword

Artifact

, : Target creature you control gets +3/+3 until end of turn. Its controller sacrifices it at the beginning of the next end step.

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.)

Clockwork Swarm

Artifact Creature — Insect (0/3)

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

Mana Vault

Artifact

Mana Vault doesn't untap during your untap step.
At the beginning of your upkeep, you may pay . If you do, untap Mana Vault.
At the beginning of your draw step, if Mana Vault is tapped, it deals 1 damage to you.
: Add .

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.