Ravager Wurm

Riot (This creature enters with your choice of a +1/+1 counter or haste.)
When this creature enters, choose up to one —
• This creature fights target creature you don't control.
• Destroy target land with an activated ability that isn't a mana ability.

Hydroid Krasis

When you cast this spell, you gain half X life and draw half X cards. Round down each time.
Flying, trample
This creature enters with X +1/+1 counters on it.

Gruul Guildgate

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

Shimmer of Possibility

Look at the top four cards of your library. Put one of them into your hand and the rest on the bottom of your library in a random order.

Gatebreaker Ram

This creature gets +1/+1 for each Gate you control.
As long as you control two or more Gates, this creature has vigilance and trample.

Growth Spiral

Draw a card. You may put a land card from your hand onto the battlefield.

Rakdos Guildgate

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

Simic Guildgate

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

Azorius Guildgate

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

Forest

Gates Ablaze

Gates Ablaze deals X damage to each creature, where X is the number of Gates you control.

Open the Gates

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

Gate Colossus

Affinity for Gates (This spell costs {1} less to cast for each Gate you control.)
This creature can't be blocked by creatures with power 2 or less.
Whenever a Gate you control enters, you may put this card from your graveyard on top of your library.

Gateway Plaza

This land enters tapped.
When this land enters, sacrifice it unless you pay {1}.
{T}: Add one mana of any color.