mtg.wtf

Visit — Exile the top X cards of your library, where X is the number of Attractions you've visited this turn. You may play those cards this turn. At the beginning of the next end step, if any of those cards remain exiled, put them on the bottom of your library in any order.

Enchant creature or planeswalker an opponent controls
At the beginning of your upkeep, enchanted permanent's controller sacrifices a nonland permanent, then that player loses 1 life.

Destroy target Head. If that Head was elite, the Hydra takes an extra turn after this one.

{T}: Add {C}.
{T}, Sacrifice Strip Mine: Destroy target land.

Instant and sorcery spells players cast have demonstrate.
Whenever chaos ensues, return up to one target instant or sorcery card from a graveyard to its owner's hand.

If a source would deal damage to a permanent or player, it deals double that damage instead.
Whenever chaos ensues, Stronghold Furnace deals 1 damage to any target.

Study enters the battlefield tapped.
{T}: Add {W} or {U}.
{4}, {T}: Investigate.

{T}: Add {C}.
{1}, {T}: Add one mana of any color. When you spend this mana to cast your commander, scry X, where X is the number of times it's been cast from the command zone this game.

{0}: If damage would be dealt to you this turn by a source of your choice, prevent that damage. Stuffy Doll Avatar deals damage to you and target opponent or planeswalker equal to half the damage prevented this way, rounded up. Activate only once each turn.

Submerged Boneyard enters the battlefield tapped.
{T}: Add {U} or {B}.

Subterranean Hangar enters the battlefield tapped.
{T}: Put a storage counter on Subterranean Hangar.
{T}, Remove any number of storage counters from Subterranean Hangar: Add {B} for each storage counter removed this way.

Sulfur Falls enters the battlefield tapped unless you control an Island or a Mountain.
{T}: Add {U} or {R}.

Sulfur Vent enters the battlefield tapped.
{T}: Add {B}.
{T}, Sacrifice Sulfur Vent: Add {U}{R}.

Sulfurous Mire enters the battlefield tapped.

{T}: Add {C}.
{T}: Add {B} or {R}. Sulfurous Springs deals 1 damage to you.

Double agenda
Whenever you cast a creature spell with one of the chosen names, you may search your library for a creature card with the other chosen name, reveal it, put it into your hand, then shuffle.

{T}, Pay 1 life: Add {R} or {W}.
{1}, {T}, Sacrifice Sunbaked Canyon: Draw a card.

Flying, vigilance, haste
Sunbird Effigy's power and toughness are each equal to the number of colors among the exiled cards used to craft it.
{T}: For each color among the exiled cards used to craft Sunbird Effigy, add one mana of that color.

Whenever you crank Sundering Fork, destroy target artifact.

Sundown Pass enters the battlefield tapped unless you control two or more other lands.
{T}: Add {R} or {W}.

{1}, {T}: Add {G}{W}.

{T}: Add {C}.
{2}{R}{W}, {T}: Target creature gains double strike until end of turn.

Sunken Citadel enters the battlefield tapped. As it enters, choose a color.
{T}: Add one mana of the chosen color.
{T}: Add two mana of the chosen color. Spend this mana only to activate abilities of land sources.

Sunken Hollow enters the battlefield tapped unless you control two or more basic lands.

{T}: Add {C}.
{U/B}, {T}: Add {U}{U}, {U}{B}, or {B}{B}.