Artifacts you control have protection from each mana value among artifacts you control. Partner (You can have two commanders if both have partner.)

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

This land enters tapped. When this land enters, return a land you control to its owner's hand. {T}: Add {W}{U}.

{T}: Add {C}. {T}, Sacrifice this land: Search your library for a basic Plains, Island, or Swamp card, put it onto the battlefield tapped, then shuffle. Cycling {W}{U}{B} ({W}{U}{B}, Discard this card: Draw a card.)

This land enters tapped. When this land enters, return a land you control to its owner's hand. {T}: Add {U}{B}.

{T}: Add one mana of any color that a land an opponent controls could produce.

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

({T}: Add {U}.)

When this land enters, sacrifice it. When you do, search your library for a basic Plains, Island, or Swamp card, put it onto the battlefield tapped, then shuffle and you gain 1 life.

This land enters tapped. When this land enters, return a land you control to its owner's hand. {T}: Add {W}{B}.

({T}: Add {W}.)

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

({T}: Add {B}.)

{T}: Add {C}. {3}, {T}, Sacrifice this land: Search your library for a land card, put it onto the battlefield tapped, then shuffle.

{T}: Add {C}. {7}, {T}: Create a 2/2 colorless Assembly-Worker artifact creature token.

{T}: Add {C}. If you control an Urza's Power-Plant and an Urza's Tower, add {C}{C} instead.

{T}: Add {C}. If you control an Urza's Mine and an Urza's Tower, add {C}{C} instead.

Counter target spell.

Return each nonland permanent that's not historic to its owner's hand. (Artifacts, legendaries, and Sagas are historic.)

Tap target creature. Metalcraft — If you control three or more artifacts, exile that creature.

Destroy all creatures with power greater than target creature's power.

Counter target noncreature spell.

Menace When this creature enters, you may destroy another target creature. If a creature is destroyed this way, you gain life equal to its toughness.

Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.) Destroy all nonartifact creatures.

Choose one — • Counter target spell. • Tap up to two target creatures.

(You may cast a legendary sorcery only if you control a legendary creature or planeswalker.) Exile all nonland permanents that aren't legendary.

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.

Double strike Ward {2} (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays {2}.) Other artifacts you control have ward {2}. Bronze Guardian's power is equal to the number of artifacts you control.

Whenever a creature you control deals combat damage to a player, you may draw a card. {1}{U}, {T}: Creatures your opponents control attack this turn if able.

Draw cards equal to the highest mana value among artifacts you control.

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

You may look at the top card of your library any time. You may play historic lands and cast historic spells from the top of your library. (Artifacts, legendaries, and Sagas are historic.) {T}: Add {U}.

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

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

{U}, {T}, Return an artifact you control to its owner's hand: You may put an artifact card from your hand onto the battlefield.

Flying {T}: Add one mana of any color.

When this creature enters, you may search your library for a basic land card, put that card onto the battlefield tapped, then shuffle. When this creature dies, you may draw a card.

When The Mightstone and Weakstone enters, choose one — • Draw two cards. • Target creature gets -5/-5 until end of turn. {T}: Add {C}{C}. This mana can't be spent to cast nonartifact spells. (Melds with Urza, Lord Protector.)

Choose two — • Creatures you don't control get -2/-0 until end of turn. • Create a tapped Powerstone token. • Create a tapped 0/0 colorless Construct artifact creature token with "This token gets +1/+1 for each artifact you control." • Scry 1, then draw a card.

Flying When Sharuum enters, you may return target artifact card from your graveyard to the battlefield.