Landfall — Whenever a land you control enters, you may attach Hard Stone to target creature.
Equipped creature gets +3/+3.
Equip {3}

Hazakh District enters tapped unless you control an Island, a Swamp, and a Mountain.
{T}: Add {U}, {B}, or {R}.

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

{T}, Sacrifice a creature: Until the end of your next turn, if you would lose unspent mana, that mana becomes colorless instead.
{2}: Add one mana of any color.

{2}, Sacrifice Helm of the Shattered Realm: Destroy target artifact or enchantment. Activate only as a sorcery.
Equipped creature gets +1/+1 and has ward {2}.
Equip {1}

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.

Holo-Map enters with two charge counters on it.
{1}, {T}, Remove a charge counter from Holo-Map: Target creature can't be blocked this turn. Scry 2.

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

Hundred-Handed Pillars enters 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.

{4}, {T}, Sacrifice this artifact: It deals 100 damage to target creature an opponent controls. Activate only as a sorcery.

Integrate target permanent spell.

Choose a card name. Target permanent gains protection from the chosen name until end of turn. Scry 2.

Enchant creature
Whenever enchanted creature deals or is dealt damage, exile it.

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.

Interrogation Chamber enters tapped.
{T}: Add {U} or {B}.
{4}: Make a pledge. Activate only as a sorcery.

When this land enters, sacrifice it. If you do, search your library for a basic Plains or Swamp card, put it onto the battlefield tapped, then shuffle.
{2}{W}{W}{B}{B}, Discard this card: Exile target nonland permanent.

This land enters tapped. As it enters, choose a color.
When this land enters, return a land you control to its owner's hand.
{T}: Add {C} and one mana of the chosen color.

Equipped creature gets +1/+0.
Whenever equipped creature deals combat damage to a player, put a stun counter on target permanent they control.
Equip {2}

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

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

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

This land enters tapped.
{2}{W}{B}, {T}: Surveil 1.

Looming Skyscrapers enters tapped.
{T}: Add {B} or {G}.
{4}: Make a pledge. Activate only as a sorcery.

When this land enters, sacrifice it. If you do, search your library for a basic Island or Swamp card, put it onto the battlefield tapped, then shuffle.
{2}{U}{U}{B}{B}, Discard this card: Surveil 2, then draw two cards.