Manamorphose

Add two mana in any combination of colors.
Draw a card.

Dryad Arbor

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

Green Sun's Zenith

Search your library for a green creature card with mana value X or less, put it onto the battlefield, then shuffle. Shuffle Green Sun's Zenith into its owner's library.

Street Wraith

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)
Cycling—Pay 2 life. (Pay 2 life, Discard this card: Draw a card.)

Concordant Crossroads

Ancient Tomb

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

Forest

Emerald Medallion

Green spells you cast cost {1} less to cast.

Eternal Witness

When this creature enters, you may return target card from your graveyard to your hand.

Llanowar Visionary

When this creature enters, draw a card.
{T}: Add {G}.

Edge of Autumn

If you control four or fewer lands, search your library for a basic land card, put it onto the battlefield tapped, then shuffle.
Cycling—Sacrifice a land. (Sacrifice a land, Discard this card: Draw a card.)

City of Traitors

When you play another land, sacrifice this land.
{T}: Add {C}{C}.

Explore

You may play an additional land this turn.
Draw a card.

Elvish Spirit Guide

Exile this creature from your hand: Add {G}.

Enter the Unknown

Target creature you control explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on the creature, then put the card back or put it into your graveyard.)
You may play an additional land this turn.