Hallowed Chamber enters tapped unless you control a basic non-Swamp land.
{T}: Add {B}.
{1}, {T}, Sacrifice Hallowed Chamber: Create two Treasure tokens.

{T}: Add {C}. If you control five or more lands, add one mana of any color instead.

Vigilance
{T}: Add {C}.
{1}, {T}: Add one mana of any color.
Spellcharge 2

Heart of the Glade enters the battlefield tapped unless you control a basic Plains or a basic Forest.

High Teqien enters tapped unless you control a basic non-Island land.
{T}: Add {U}.
{2}{U}, {T}, Sacrifice High Teqien: Gain control of target land. Its owner may search their library for a basic land card, put it onto the battlefield, then shuffle.

Hundred-Handed Pillars enters the battlefield tapped.
{T}: Add {W} or {U}.
{7}{W/U}: Hundred-Handed Pillars becomes a 4/6 white and blue Giant creature with vigilance until end of turn. It's still a land. This ability costs {X} less to activate, where X is your devotion to white and blue. Activate only once each turn.

Hyperloop Obelisk enters the battlefield tapped.
{T}: Add {U}, {B}, or {R}.
{VP}{VP}{VP}{VP}, Discard Hyperloop Obelisk: Untap target creature. It gets +4/+4 until end of turn.

Deathtouch
When this creature transforms into Iris Flayer, target player draws a card and loses 1 life.

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

Whenever this creature transforms into Lone Switchblade or another permanent you control transforms, each opponent loses 1 life and you gain 1 life.

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.

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.

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

Indestructible
As long as your devotion to blue and black is less than seven, Phenax isn't a creature.
At the beginning of each end step, each opponent mills X cards, where X is the number of cards put into their graveyard from anywhere this turn. You gain life equal to the number of cards milled this way.