From the Vault: Realms

Land

{T}: Add {C}{C}. This land deals 2 damage to you.

Ancient Tomb

Legendary Land

Boseiju enters tapped.
{T}, Pay 2 life: Add {C}. If that mana is spent on an instant or sorcery spell, that spell can't be countered.

Boseiju, Who Shelters All

{T}: Add {U}. This land deals 1 damage to you.
Threshold — {U}, {T}, Sacrifice this land: Target player draws three cards, then discards three cards. Activate only if there are seven or more cards in your graveyard.

Cephalid Coliseum

Land — Desert

{T}: Add {C}.
{T}: This land deals 1 damage to target attacking creature. Activate only during the end of combat step.

Desert

Land Creature — Forest Dryad

(This land isn't a spell, it's affected by summoning sickness, and it has "{T}: Add {G}.")

Dryad Arbor

Spirit

{T}: Add one mana of any color.
Whenever you tap this land for mana, target opponent creates a 1/1 colorless Spirit creature token.

Forbidden Orchard

Cumulative upkeep—Pay 2 life. (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
When this land enters, sacrifice a land.
Creatures you control can't attack.
Prevent all damage that would be dealt to you.

Glacial Chasm

{T}: Add {C}.
{T}: Add {R} or {G}. Each opponent gains 1 life.

Grove of the Burnwillows

{T}: Add {C}.
{T}, Sacrifice a creature: You gain 1 life.

High Market

{T}: Untap target attacking creature. Prevent all combat damage that would be dealt to and dealt by that creature this turn.

Maze of Ith

Land — Forest

({T}: Add {G}.)
As this land enters, you may reveal a Treefolk card from your hand. If you don't, this land enters tapped.
{T}: Add {W} or {B}. This land deals 1 damage to you.

Murmuring Bosk

{T}: Add {C}.
{2}{R}, {T}: Shivan Gorge deals 1 damage to each opponent.

Shivan Gorge

Each land is a Swamp in addition to its other land types.

Urborg, Tomb of Yawgmoth

You may have this land enter tapped as a copy of any land on the battlefield.

Vesuva

Hideaway 4 (When this land enters, look at the top four cards of your library, exile one face down, then put the rest on the bottom in a random order.)
This land enters tapped.
{T}: Add {W}.
{W}, {T}: You may play the exiled card without paying its mana cost if you attacked with three or more creatures this turn.