Cards in graveyards can't leave the graveyard.
Cycling {2}

When this land enters, sacrifice it. If you do, search your library for a basic Swamp or Mountain card, put it onto the battlefield tapped, then shuffle.
{2}{B}{B}{R}{R}, Discard this card: Create a 4/4 red Error creature token with menace.

Field Laboratory enters tapped.
{T}: Add {G} or {U}.
{1}, Discard Field Laboratory: Scry 2.

Before equipped creature would assign, deal, or be dealt damage, sacrifice Figy Berry. If you do, equipped creature gets +2/+2 until end of turn.
Equip {1}
{7}, Sacrifice Figy Berry: Destroy target nonland permanent.

Draw a card. If you control no creatures, create a 1/1 colorless Cyborg artifact creature token.

This spell costs {1} less to cast if it targets a spell you control and costs {1} less to cast if it targets a spell with mana value 3 or less.
Copy target spell. You may choose new targets for the copy.

This land enters tapped.
{2}{R}{G}, {T}: Surveil 1.

Equipped creature gets +2/+2 and can't be blocked by more than one creature.
Equip {4}

When this land enters, sacrifice it. If you do, search your library for a basic Swamp or Forest card, put it onto the battlefield tapped, then shuffle.
{2}{B}{B}{G}{G}, Discard this card: Return up to one target creature card and up to one target enchantment card from your graveyard to your hand.

This land enters tapped unless you control one or fewer other lands.
{T}: Add {B} or {G}.
Cycling {2}

Fortress Arena enters tapped.
{T}: Add {R} or {W}.
{2}{R}{W}, {T}, Sacrifice Fortress Arena: Draw a card.

Frigid Highlands enters tapped unless you control an Island.
{T}: Add {R} or {G}.

{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast Shrine spells or activate abilities of Shrines.

{T}: Add {C}.
{2}, {T}: Add two mana of different colors.
{4}, {T}: Look at the top X cards of your library, where X is the number of different color pairs among permanents you control that are exactly two colors. Put one of those cards into your hand and the rest on the bottom of your library in a random order.

Gates to the Underworld enters tapped.
{T}: Add {W} or {B}.
{5}{W/B}: Gates to the Underworld becomes a 3/4 white and black Construct creature with lifelink until end of turn. It's still a land. This ability costs {X} less to activate, where X is your devotion to white and black. Activate only once each turn.

Whenever you play a card with mana value equal to the number of charge counters on Gilded Font, put a charge counter on it.
{2}, Sacrifice Gilded Font: You draw X cards and gain twice X life, where X is the number of charge counters on Gilded Font.

When Glassblower's Forge enters, draw a card.
{1}, {T}, Sacrifice Glassblower's Forge and another artifact or enchantment: Draw a card.

Gleaming Hot Springs enters tapped unless you control a Mountain.
{T}: Add {W} or {U}.

When this land enters, sacrifice it. If you do, search your library for a basic Mountain or Plains card, put it onto the battlefield tapped, then shuffle.
{1}{R}{R}{W}{W}, Discard this card: Creatures you control get +2/+1 until end of turn.

Before equipped creature would assign, deal, or be dealt damage, sacrifice Gold Berry. If you do, equipped creature gets +2/+2 until end of turn.
When you sacrifice Gold Berry, create a Berry token and a Treasure token.
Equip {1}

At the beginning of combat on your turn, put a +1/+1 counter on equipped creature.
Equipped creature has flying as long as it has two or more +1/+1 counters on it.
Equipped creature has double strike as long as it has four or more +1/+1 counters on it.
Equip {2}

This land enters tapped.
Level up {R}{R}{R}
[level 1-2] Menace
This land is also a creature.
[level 3+] Menace
This land is also a creature.

Groupthink Tank enters tapped.
{T}: Add {W} or {B}.
{4}: Make a pledge. Activate only as a sorcery.

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