Time Sieve

{T}, Sacrifice five artifacts: Take an extra turn after this one.

Mishra's Bauble

{T}, Sacrifice Mishra's Bauble: Look at the top card of target player's library. Draw a card at the beginning of the next turn's upkeep.

Thopter Foundry

{1}, Sacrifice a nontoken artifact: Put a 1/1 blue Thopter artifact creature token with flying onto the battlefield. You gain 1 life.

Sword of the Meek

Equipped creature gets +1/+2. Equip {2} Whenever a 1/1 creature comes into play under your control, you may return Sword of the Meek from your graveyard to play, then attach it to that creature.

Snow-Covered Plains

{T}: Add {W} to your mana pool.

Snow-Covered Island

{T}: Add {U} to your mana pool.

Snow-Covered Swamp

{T}: Add {B} to your mana pool.

Ichor Wellspring

When Ichor Wellspring enters the battlefield or is put into a graveyard from the battlefield, draw a card.

Pentad Prism

Sunburst (This enters the battlefield with a charge counter on it for each color of mana spent to cast it.) Remove a charge counter from Pentad Prism: Add one mana of any color to your mana pool.

Batterskull

Living weapon (When this Equipment enters the battlefield, put a 0/0 black Germ creature token onto the battlefield, then attach this to it.) Equipped creature gets +4/+4 and has vigilance and lifelink. {3}: Return Batterskull to its owner's hand. Equip {5}

Detention Sphere

When Detention Sphere enters the battlefield, you may exile target nonland permanent not named Detention Sphere and all other permanents with the same name as that permanent. When Detention Sphere leaves the battlefield, return the exiled cards to the battlefield under their owner's control.

Mox Opal

Metalcraft — {T}: Add one mana of any color to your mana pool. Activate this ability only if you control three or more artifacts.

Nihil Spellbomb

{T}, Sacrifice Nihil Spellbomb: Exile all cards from target player's graveyard. When Nihil Spellbomb is put into a graveyard from the battlefield, you may pay {B}. If you do, draw a card.

Ensnaring Bridge

Each creature with power greater than the number of cards in your hand cannot attack.

Pithing Needle

As Pithing Needle comes into play, name a card. Activated abilities of sources with the chosen name can't be played unless they're mana abilities.

Thoughtseize

Target player reveals his or her hand. You choose a nonland card from it. That player discards that card. You lose 2 life.

Chromatic Star

{1}, {T}, Sacrifice Chromatic Star: Add one mana of any color to your mana pool. When Chromatic Star is put into a graveyard from play, draw a card.

Stoneforge Mystic

When Stoneforge Mystic enters the battlefield, you may search your library for an Equipment card, reveal it, put it into your hand, then shuffle your library. {1}{W}, {T}: You may put an Equipment card from your hand onto the battlefield.

Flooded Strand

Polluted Delta

Watery Grave

Inventors' Fair

Whir of Invention

Hallowed Fountain

({T}: Add {W} or {U}.) As Hallowed Fountain enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.

Teferi, Time Raveler

Each opponent can cast spells only any time they could cast a sorcery. +1: Until your next turn, you may cast sorcery spells as though they had flash. −3: Return up to one target artifact, creature, or enchantment to its owner's hand. Draw a card.

Grafdigger's Cage

Creature cards in graveyards and libraries can't enter the battlefield. Players can't cast spells from graveyards or libraries.