Book of Rass

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.

Ring of Renewal

Artifact

, : Discard a card at random, then draw two cards.

Al-abara's Carpet

Artifact

, : Prevent all damage that would be dealt to you this turn by attacking creatures without flying.

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.

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.

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.

Diabolic Machine

Artifact Creature — Construct (4/4)

: Regenerate Diabolic Machine.

Ebony Rhino

Artifact Creature — Rhino (4/5)

Trample

Mana Matrix

Artifact

Instant and enchantment spells you cast cost up to less to cast.

Obsianus Golem

Artifact Creature — Golem (4/6)

Planar Gate

Artifact

Creature spells you cast cost up to less to cast.

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.

Scarecrow

Artifact Creature — Scarecrow (2/2)

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

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.

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 Miter

Artifact

Whenever an artifact you control is put into a graveyard from the battlefield, if it wasn't sacrificed, you may pay . If you do, draw a card.

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 .

Tablet of Epityr

Artifact

Whenever an artifact you control is put into a graveyard from the battlefield, you may pay . If you do, you gain 1 life.

Urza's Chalice

Artifact

Whenever a player casts an artifact spell, you may pay . If you do, you gain 1 life.