Plains

Sphinx of Magosi

Flying
{2}{U}: Draw a card, then put a +1/+1 counter on Sphinx of Magosi.

Izzet Guildgate

This land enters tapped.
{T}: Add {U} or {R}.

Young Pyromancer

Whenever you cast an instant or sorcery spell, create a 1/1 red Elemental creature token.

Azorius Guildgate

This land enters tapped.
{T}: Add {W} or {U}.

Crackling Drake

Flying
Crackling Drake's power is equal to the total number of instant and sorcery cards you own in exile and in your graveyard.
When Crackling Drake enters, draw a card.

Island

Counterspell

Conclave Tribunal

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
When Conclave Tribunal enters, exile target nonland permanent an opponent controls until Conclave Tribunal leaves the battlefield.

Ob Nixilis's Cruelty

Target creature gets -5/-5 until end of turn. If that creature would die this turn, exile it instead.

Swamp

Dimir Guildgate

This land enters tapped.
{T}: Add {U} or {B}.

Forest

Expressive Iteration

Look at the top three cards of your library. Put one of them into your hand, put one of them on the bottom of your library, and exile one of them. You may play the exiled card this turn.

Narset, Parter of Veils

Each opponent can't draw more than one card each turn.
−2: Look at the top four cards of your library. You may reveal a noncreature, nonland card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Orzhov Guildgate

This land enters tapped.
{T}: Add {W} or {B}.

Preordain

Scry 2, then draw a card. (To scry 2, look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)

Rakdos Guildgate

This land enters tapped.
{T}: Add {B} or {R}.

Mountain

Evolving Wilds

{T}, Sacrifice this land: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Gruul Guildgate

This land enters tapped.
{T}: Add {R} or {G}.

Simic Guildgate

This land enters tapped.
{T}: Add {G} or {U}.

Dismember

({B/P} can be paid with either {B} or 2 life.)
Target creature gets -5/-5 until end of turn.

Golgari Guildgate

This land enters tapped.
{T}: Add {B} or {G}.

Mana Leak

Counter target spell unless its controller pays {3}.

Selesnya Guildgate

This land enters tapped.
{T}: Add {G} or {W}.

Wilderness Reclamation

At the beginning of your end step, untap all lands you control.

Boros Guildgate

This land enters tapped.
{T}: Add {R} or {W}.

Brainstorm

Draw three cards, then put two cards from your hand on top of your library in any order.