Azorius Guildgate

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

Island

Swamp

Simic Guildgate

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

Coiling Oracle

When this creature enters, reveal the top card of your library. If it's a land card, put it onto the battlefield. Otherwise, put that card into your hand.

Selesnya Guildgate

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

Golgari Guildmage

{4}{B}, Sacrifice a creature: Return target creature card from your graveyard to your hand.
{4}{G}: Put a +1/+1 counter on target creature.

Open the Gates

Search your library for a basic land card or Gate card, reveal it, put it into your hand, then shuffle.

Arboreal Grazer

Reach
When this creature enters, you may put a land card from your hand onto the battlefield tapped.

Golgari Findbroker

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

Last Gasp

Target creature gets -3/-3 until end of turn.

Forest

Dimir Guildgate

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

Loaming Shaman

When this creature enters, target player shuffles any number of target cards from their graveyard into their library.

Golgari Guildgate

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

Putrefy

Destroy target artifact or creature. It can't be regenerated.

Selesnya Guildmage

{3}{G}: Create a 1/1 green Saproling creature token.
{3}{W}: Creatures you control get +1/+1 until end of turn.