Mistvault Bridge

This land enters tapped.
Indestructible
{T}: Add {U} or {B}.

Island

Drossforge Bridge

This land enters tapped.
Indestructible
{T}: Add {B} or {R}.

Disciple of the Vault

Whenever an artifact is put into a graveyard from the battlefield, you may have target opponent lose 1 life.

Thirst for Knowledge

Draw three cards. Then discard two cards unless you discard an artifact card.

Sojourner's Companion

Affinity for artifacts
Artifact landcycling {2} ({2}, Discard this card: Search your library for an artifact land card, reveal it, put it into your hand, then shuffle.)

Thoughtcast

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)
Draw two cards.

Myr Enforcer

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)

Talisman of Dominance

{T}: Add {C}.
{T}: Add {U} or {B}. This artifact deals 1 damage to you.

Spellbook

Cranial Plating

Equipped creature gets +1/+0 for each artifact you control.
{B}{B}: Attach this Equipment to target creature you control.
Equip {1}

Darksteel Citadel

Silverbluff Bridge

This land enters tapped.
Indestructible
{T}: Add {U} or {R}.

Broodstar

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)
Flying
Broodstar's power and toughness are each equal to the number of artifacts you control.

Paradise Mantle

Equipped creature has "{T}: Add one mana of any color."
Equip {1}

Frogmite

Atog

Sacrifice an artifact: This creature gets +2/+2 until end of turn.

Mountain

Talisman of Indulgence

{T}: Add {C}.
{T}: Add {B} or {R}. This artifact deals 1 damage to you.

Swamp

Arcbound Worker

Modular 1 (This creature enters with a +1/+1 counter on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Welding Jar

Sacrifice this artifact: Regenerate target artifact.

Ornithopter

Aether Spellbomb

{U}, Sacrifice this artifact: Return target creature to its owner's hand.
{1}, Sacrifice this artifact: Draw a card.

Evolving Wilds

{T}, Sacrifice this land: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.