Each player reveals their hand, then you choose a nonland card type. Each player discards all cards of the chosen type, then draws a card for each card they discarded this way.
Draw a card.

Target player exiles two permanents they control with different mana values.

Equipped creature gets +2/+1.
Equip {VP}{VP}

Whenever you draw a card, each opponent loses 1 life and you gain 1 life.
{T}: Each player draws a card.
{2}, {T}: Draw a card.

Equipped creature gets +3/+1.
Whenever a Ruin you control becomes spellcharged, you may attach Landmark Blade to it.
Equip {3}

Lavatorn Fields enters the battlefield tapped unless you control a basic Swamp or a basic Mountain.

{T}, Sacrifice Leyshard: Draw a card. Add one mana of any type.

Equipped creature gets +2/+0.
Whenever equipped creature attacks, return target creature card with lesser power from a graveyard to the battlefield under your control tapped and attacking. Exile it at the beginning of the next end step, or if it would leave the battlefield.
Equip {3}

{T}: Add one mana of any color.
As long as you're ancient, lands you you control are every basic land type in addition to their other types.

Lunar Plateau enters tapped.
{T}: Add {W} or {B}.
{1}, Discard Lunar Plateau: Scry 2.

Lush Oasis enters the battlefield tapped unless you control a basic Forest or a basic Island.

Magdalena Bay enters the battlefield tapped.
{T}: Add {G}, {W} or {U}.
{VP}{VP}{VP}{VP}, Discard Magdalena Bay: Target creature gets +3/+3 and gains menace until end of turn.

{2}, {T}: Exile target creature you control, then reveal the top card of your library. If the revealed card is a creature card, put it onto the battlefield. Otherwise, return the exiled card to the battlefield under its owner's control.

Miasmic Cove enters the battlefield tapped.
{T}: Add {B} or {G}.
{4}{B/G}: Miasmic Cove becomes a 2/3 black and green Snake creature with deathtouch until end of turn. It's still a land. This ability costs {X} less to activate, where X is your devotion to black and green. Activate only once each turn.

Mirrormeld Spire has all abilities of land cards integrated onto it.
{T}: Add {C}.
{C}, {T}: Integrate the top card of target player's library.

Nascent Lightvein enters the battlefield tapped.
As Nascent Lightvein enters the battlefield, choose a color. Then if you control three permanents that could each produce a different color of mana, untap it.
{T}: Add one mana of the chosen color.

Nebulous Ring enters tapped.
{T}: Add {C} or {W}.
{1}, Discard Nebulous Ring: Scry 2.

Neo Stehlia enters tapped unless you control a basic non-Plains land.
{T}: Add {W}.
{2}{W}, {T}: Choose a creature type. Creatures you control of the chosen type get +1/+0 until end of turn.

Nessian Woods enters the battlefield tapped.
{T}: Add {R} or {G}.
{6}{R/G}: Nessian Woods becomes a 5/4 red and green Dryad creature with trample until end of turn. It's still a land. This ability costs {X} less to activate, where X is your devotion to red and green. Activate only once each turn.

As New Divide enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.
{T}, Sacrifice New Divide: Search your library for a basic land card, put it onto the battlefield, then shuffle.

Nimbus of Thought enters the battlefield tapped.
{T}: Add {U} or {R}.
{4}{U/R}: Until end of turn, Nimbus of Thought becomes a 3/3 blue and red Elemental creature with “Whenever this creature becomes tapped, you may discard a card. If you do, draw a card.” It's still a land. This ability costs {X} less to activate, where X is your devotion to blue and red. Activate only once each turn.

At the beginning of your upkeep, integrate the top card of target player's library.
Whenever a creature card is integrated onto Offerings to Sky Gods, create a 1/1 colorless Cyborg artifact creature token.

Ozzen Headquarters enters the battlefield tapped.
{T}: Add {W} or {B}.
{T}, Discard another card named Ozzen Headquarters: Draw a card.