Spells you control can't be countered. At the beginning of your end step, discover 5. (Exile cards from the top of your library until you exile a nonland card with mana value 5 or less. Cast it without paying its mana cost or put it into your hand. Put the rest on the bottom in a random order.)

You may look at the top card of your library any time. You may cast artifact spells and colorless spells from the top of your library. {T}, Pay 1 life: Exile the top card of your library.

Whenever an opponent casts a spell, you may draw a card unless that player pays {1}.

Whenever equipped creature deals combat damage to a player, look at that many cards from the top of your library. You may exile a nonland card from among them. Put the rest on the bottom of your library in a random order. You may cast the exiled card without paying its mana cost. Equip {2}{U}

This artifact enters tapped. {W}{W}{U}{U}{B}{B}{R}{R}{G}{G}, {T}, Sacrifice this artifact: Target player loses the game.

Trample, infect, indestructible If Blightsteel Colossus would be put into a graveyard from anywhere, reveal Blightsteel Colossus and shuffle it into its owner's library instead.

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

{T}: Add one mana of any color in your commander's color identity.

When this land enters, sacrifice it unless you return a non-Lair land you control to its owner's hand. {T}: Add {U}, {B}, or {R}.

When this land enters, sacrifice it unless you return a non-Lair land you control to its owner's hand. {T}: Add {B}, {R}, or {G}.

This land enters tapped unless you control two or more other lands. {T}: Add {G} or {U}.

When this land enters, sacrifice it unless you return a non-Lair land you control to its owner's hand. {T}: Add {W}, {U}, or {B}.

({T}: Add {G}.)

({T}: Add {W} or {B}.) As this land enters, you may pay 2 life. If you don't, it enters tapped.

({T}: Add {U}.)

This land enters tapped unless you have two or more opponents. {T}: Add {B} or {R}.

({T}: Add {R}.)

({T}: Add {W}.)

({T}: Add {W} or {U}.) This land enters tapped unless you control two or more basic lands.

When this land enters, sacrifice it unless you return a non-Lair land you control to its owner's hand. {T}: Add {R}, {G}, or {W}.

{T}: Add {U}.

({T}: Add {B}.)

When this land enters, sacrifice it unless you return a non-Lair land you control to its owner's hand. {T}: Add {G}, {W}, or {U}.

Flying Equipped creature has flying and "You can't lose the game and your opponents can't win the game." Reconfigure {5} ({5}: Attach to target creature you control; or unattach from a creature. Reconfigure only as a sorcery. While attached, this isn't a creature.)

No more than two creatures can attack you each combat.

Artifacts you control have indestructible. (Effects that say "destroy" don't destroy them. Artifact creatures with indestructible can't be destroyed by damage.)

Indestructible Once each turn, you may pay {0} rather than pay the mana cost for a colorless spell you cast from your hand.

If you control a commander, you may cast this spell without paying its mana cost. You may choose new targets for target spell or ability.

Put a +1/+1 counter on target creature you control. It gains reach, trample, hexproof, and indestructible until end of turn. (It can't be the target of spells or abilities your opponents control. Damage and effects that say "destroy" don't destroy it.)

Equipped creature has haste and shroud. (It can't be the target of spells or abilities.) Equip {0}

All permanents are artifacts in addition to their other types. All cards that aren't on the battlefield, spells, and permanents are colorless. Players may spend mana as though it were mana of any color.

Enchant creature Enchanted creature gets +1/+1 for each artifact and/or enchantment you control.

{T}: Add one mana of any color.

{T}: Add one mana of any color in your commander's color identity.

Lands you control have "{T}: Add one mana of any color." {T}: Add one mana of any color.

You have no maximum hand size. {T}: Add one mana of any color.

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

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

At the beginning of your upkeep, if an opponent controls more lands than you, you may search your library for up to three basic land cards, reveal them, put them into your hand, then shuffle.

If this card is in your opening hand, you may begin the game with it on the battlefield. Each nonland permanent you control is all colors. Lands you control are every basic land type in addition to their other types.

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.) Artifact creature spells you cast have affinity for artifacts. (They cost {1} less to cast for each artifact you control.)

When this artifact enters or is put into a graveyard from the battlefield, you may search your library for a basic land card, reveal it, put it into your hand, then shuffle.

{T}: Add {C}{C}.

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.)

You have no maximum hand size. {T}: Add {C}.

{T}: Add {C}{C}{C}.

When Urza enters, create a 0/0 colorless Construct artifact creature token with "This token gets +1/+1 for each artifact you control." Tap an untapped artifact you control: Add {U}. {5}: Shuffle your library, then exile the top card. Until end of turn, you may play that card without paying its mana cost.

Guardian Protocols — {3}{B}, Sacrifice this creature: Return all legendary creature cards from your graveyard to your hand.

Counter target spell.

Destroy target artifact or enchantment.

Destroy target nonartifact creature.

When this creature dies, you gain 2 life. {G}, Sacrifice this creature: Exile target noncreature artifact or noncreature enchantment.

Flying, trample Whenever this creature deals combat damage to a player, gain control of all artifacts that player controls. At the beginning of your upkeep, if you control twenty or more artifacts, you win the game.

Counter target spell that targets you or a permanent you control. Draw a card.

Exile target creature. Its controller may search their library for a basic land card, put that card onto the battlefield tapped, then shuffle.

{T}: Target artifact creature's controller sacrifices it. That player may search their library for a noncreature artifact card, put it onto the battlefield, then shuffle.

Search your library for an artifact or enchantment card, reveal it, then shuffle and put that card on top.

Counter target spell unless its controller pays {1} for each artifact you control.

Flying Metalcraft — Artifacts you control have shroud as long as you control three or more artifacts. (An artifact with shroud can't be the target of spells or abilities.)

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.) Indestructible (Damage and effects that say "destroy" don't destroy this creature.) If Darksteel Colossus would be put into a graveyard from anywhere, reveal Darksteel Colossus and shuffle it into its owner's library instead.

Protection from everything If Progenitus would be put into a graveyard from anywhere, reveal Progenitus and shuffle it into its owner's library instead.

Flash You may cast artifact spells as though they had flash.