Prevent all combat damage that would be dealt this turn.

Door to Nothingness

Door to Nothingness enters tapped.
{W}{W}{U}{U}{B}{B}{R}{R}{G}{G}, {T}, Sacrifice Door to Nothingness: Target player loses the game.

Iron Myr

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Gruul Guildgate

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

Counterspell

Orzhov Guildgate

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

Izzet Guildgate

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

Gond Gate

Gates you control enter untapped.
{T}: Add {C}.
{T}: Add one mana of any color that a Gate you control could produce.

Silver Myr

Emergency Weld

Return target artifact or creature card from your graveyard to your hand. Create a 1/1 colorless Soldier artifact creature token.

Boros Guildgate

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

Doom Blade

Path to Exile

Exile target creature. Its controller may search their library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Rakdos Guildgate

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

Simic Guildgate

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

Gold Myr

Selesnya Guildgate

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

Copper Myr

Skyship Weatherlight

When Skyship Weatherlight enters, search your library for any number of artifact and/or creature cards, exile them, then shuffle.
{4}, {T}: Choose a card at random that was exiled with Skyship Weatherlight. Put that card into its owner's hand.

Dimir Guildgate

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

Azorius Guildgate

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

Ivory Tower

At the beginning of your upkeep, you gain X life, where X is the number of cards in your hand minus 4.