Each player chooses a number of lands they control equal to the number of lands controlled by the player who controls the fewest, then sacrifices the rest. Players discard cards and sacrifice creatures the same way.
--
Bayou
Land - Swamp Forest
({T}: Add {B} or {G}.)
--
Bayou
Land - Swamp Forest
({T}: Add {B} or {G}.)
--
Bazaar of Baghdad
Land
{T}: Draw two cards, then discard three cards.
{0}
Black Lotus
Artifact
{T}, Sacrifice Black Lotus: Add three mana of any one color.
{1}
Black Vise
Artifact
As Black Vise enters the battlefield, choose an opponent.
At the beginning of the chosen player's upkeep, Black Vise deals X damage to that player, where X is the number of cards in their hand minus 4.
{X}{U}{U}
Braingeyser
Sorcery
Target player draws X cards.
{R}
Chain Lightning
Sorcery
Chain Lightning deals 3 damage to any target. Then that player or that permanent's controller may pay {R}{R}. If the player does, they may copy this spell and may choose a new target for that copy.
{G}{G}
Channel
Sorcery
Until end of turn, any time you could activate a mana ability, you may pay 1 life. If you do, add {C}.
{U}{U}
Counterspell
Instant
Counter target spell.
{B}{G}
Dark Heart of the Wood
Enchantment
Sacrifice a Forest: You gain 3 life.
{1}{W}
Divine Offering
Instant
Destroy target artifact. You gain life equal to its mana value.
--
Library of Alexandria
Land
{T}: Add {C}.
{T}: Draw a card. Activate only if you have exactly seven cards in hand.
{U}{U}
Mana Drain
Instant
Counter target spell. At the beginning of your next main phase, add an amount of {C} equal to that spell's mana value.
--
Maze of Ith
Land
{T}: Untap target attacking creature. Prevent all combat damage that would be dealt to and dealt by that creature this turn.
{0}
Mox Emerald
Artifact
{T}: Add {G}.
{0}
Mox Jet
Artifact
{T}: Add {B}.
{0}
Mox Pearl
Artifact
{T}: Add {W}.
{0}
Mox Ruby
Artifact
{T}: Add {R}.
{0}
Mox Sapphire
Artifact
{T}: Add {U}.
{X}{X}{U}
Recall
Sorcery
Discard X cards, then return a card from your graveyard to your hand for each card discarded this way. Exile Recall.
{3}{G}
Storm Seeker
Instant
Storm Seeker deals damage to target player equal to the number of cards in that player's hand.
{1}{G}
Sylvan Library
Enchantment
At the beginning of your draw step, you may draw two additional cards. If you do, choose two cards in your hand drawn this turn. For each of those cards, pay 4 life or put the card on top of your library.
--
The Tabernacle at Pendrell Vale
Legendary Land
All creatures have "At the beginning of your upkeep, destroy this creature unless you pay {1}."
{B}{B}{B}
Underworld Dreams
Enchantment
Whenever an opponent draws a card, Underworld Dreams deals 1 damage to that player.
{3}{W}
Armageddon
Sorcery
Destroy all lands.
{X}{R}
Detonate
Sorcery
Destroy target artifact with mana value X. It can't be regenerated. Detonate deals X damage to that artifact's controller.
{W}{W}
Eye for an Eye
Instant
The next time a source of your choice would deal damage to you this turn, instead that source deals that much damage to you and Eye for an Eye deals that much damage to that source's controller.
{1}
Feldon's Cane
Artifact
{T}, Exile Feldon's Cane: Shuffle your graveyard into your library.
{6}
Mirror Universe
Artifact
{T}, Sacrifice Mirror Universe: Exchange life totals with target opponent. Activate only during your upkeep.
{2}{W}{W}
Moat
Enchantment
Creatures without flying can't attack.
{3}{W}
Presence of the Master
Enchantment
Whenever a player casts an enchantment spell, counter it.
{U}
Psychic Purge
Sorcery
Psychic Purge deals 1 damage to any target.
When a spell or ability an opponent controls causes you to discard Psychic Purge, that player loses 5 life.
{3}{B}
The Abyss
World Enchantment
At the beginning of each player's upkeep, destroy target nonartifact creature that player controls of their choice. It can't be regenerated.