Stubborn Denial

Counter target noncreature spell unless its controller pays {1}. Ferocious — If you control a creature with power 4 or greater, counter that spell instead.

Springleaf Drum

{T}, Tap an untapped creature you control: Add one mana of any color to your mana pool.

Ensoul Artifact

Enchant artifact Enchanted artifact is a creature with base power and toughness 5/5 in addition to its other types.

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.

Welding Jar

Sacrifice Welding Jar: Regenerate target artifact.

Inkmoth Nexus

{T}: Add {1} to your mana pool. {1}: Inkmoth Nexus becomes a 1/1 Blinkmoth artifact creature with flying and infect until end of turn. It's still a land. (It deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)

Tezzeret, Agent of Bolas

+1: Look at the top five cards of your library. You may reveal an artifact card from among them and put it into your hand. Put the rest on the bottom of your library in any order. -1: Target artifact becomes a 5/5 artifact creature. -4: Target player loses X life and you gain X life, where X is twice the number of artifacts you control.

Arcbound Ravager

Sacrifice an artifact: Put a +1/+1 counter on Arcbound Ravager. Modular 1 (This enters the battlefield with a +1/+1 counter on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Glimmervoid

At the beginning of the end step, if you control no artifacts, sacrifice Glimmervoid. {T}: Add one mana of any color to your mana pool.

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.

Darksteel Citadel

Indestructible (Effects that say "destroy" don't destroy this land.) {T}: Add {1} to your mana pool.

Spellskite

{U/P}: Change a target of target spell or ability to Spellskite. ({U/P} can be paid with either {U} or 2 life.)

Cranial Plating

Equipped creature gets +1/+0 for each artifact you control. {B}{B}: Attach Cranial Plating to target creature you control. Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)

Vault Skirge

({B/P} can be paid with either {B} or 2 life.) Flying Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Etched Champion

Metalcraft — Etched Champion has protection from all colors as long as you control three or more artifacts.

Memnite

Mox Opal

Metalcraft — {T}: Add one mana of any color to your mana pool. Activate this ability only if you control three or more artifacts.

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.

Academy Ruins

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

Ornithopter

Grafdigger's Cage

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

Island

({T}: Add {U}.)