Cavern of Souls

As Cavern of Souls enters the battlefield, choose a creature type. {T}: Add {1} to your mana pool. {T}: Add one mana of any color to your mana pool. Spend this mana only to cast a creature spell of the chosen type, and that spell can't be countered.

Chief Engineer

Artifact spells you cast have convoke. (Your creatures can help cast those spells. Each creature you tap while casting an artifact spell pays for {1} or one mana of that creature's color.)

Hangarback Walker

Hangarback Walker enters the battlefield with X +1/+1 counters on it. When Hangarback Walker dies, put a 1/1 colorless Thopter artifact creature token with flying onto the battlefield for each +1/+1 counter on Hangarback Walker.{1}, {T}: Put a +1/+1 counter on Hangarback Walker.

Chalice of the Void

Chalice of the Void enters the battlefield with X charge counters on it. Whenever a player casts a spell with converted mana cost equal to the number of charge counters on Chalice of the Void, counter that spell.

Blinkmoth Nexus

{T}: Add {1} to your mana pool. {1}: Blinkmoth Nexus becomes a 1/1 Blinkmoth artifact creature with flying until end of turn. It's still a land. {1}, {T}: Target Blinkmoth creature gets +1/+1 until end of turn.

Phyrexian Metamorph

({U/P} can be paid with either {U} or 2 life.) You may have Phyrexian Metamorph enter the battlefield as a copy of any artifact or creature on the battlefield, except it's an artifact in addition to its other types.

Dismember

({B/P} can be paid with either {B} or 2 life.) Target creature gets -5/-5 until end of turn.

Batterskull

Living weapon (When this Equipment enters the battlefield, put a 0/0 black Germ creature token onto the battlefield, then attach this to it.) Equipped creature gets +4/+4 and has vigilance and lifelink. {3}: Return Batterskull to its owner's hand. Equip {5}

Judge's Familiar

Flying Sacrifice Judge's Familiar: Counter target instant or sorcery spell unless its controller pays {1}.

Unified Will

Counter target spell if you control more creatures than that spell's controller.

Grand Architect

Other blue creatures you control get +1/+1. {U}: Target artifact creature becomes blue until end of turn. Tap an untapped blue creature you control: Add {2} to your mana pool. Spend this mana only to cast artifact spells or activate abilities of artifacts.

Trinket Mage

When Trinket Mage enters the battlefield, you may search your library for an artifact card with converted mana cost 1 or less, reveal that card, and put it into your hand. If you do, shuffle your library.

Wurmcoil Engine

Deathtouch, lifelink When Wurmcoil Engine is put into a graveyard from the battlefield, put a 3/3 colorless Wurm artifact creature token with deathtouch and a 3/3 colorless Wurm artifact creature token with lifelink onto the battlefield.

Etherium Sculptor

Artifact spells you play cost {1} less to play.

Master of Etherium

Master of Etherium's power and toughness are each equal to the number of artifacts you control. Other artifact creatures you control get +1/+1.

Relic of Progenitus

{T}: Target player removes a card in his or her graveyard from the game. {1}, Remove Relic of Progenitus from the game: Remove all graveyards from the game. Draw a card.

Hurkyl's Recall

Return all artifacts target player owns to his or her hand.

Pithing Needle

As Pithing Needle comes into play, name a card. Activated abilities of sources with the chosen name can't be played unless they're mana abilities.

Academy Ruins

{T}: Add {1} to your mana pool. {1}{U}, {T}: Put target artifact card in your graveyard on top of your library.

Basilisk Collar

Equipped creature has deathtouch and lifelink. Equip {2}

Lodestone Golem

Nonartifact spells cost {1} more to cast.

Mausoleum Wanderer

Ceremonious Rejection

Walking Ballista

Grafdigger's Cage

Creature cards in graveyards and libraries can't enter the battlefield. Players can't cast spells from graveyards or libraries.