Thran Quarry

At the beginning of the end step, if you control no creatures, sacrifice Thran Quarry.
{T}: Add one mana of any color.

Swords to Plowshares

Exile target creature. Its controller gains life equal to its power.

Gemstone Mine

Gemstone Mine enters with three mining counters on it.
{T}, Remove a mining counter from Gemstone Mine: Add one mana of any color. If there are no mining counters on Gemstone Mine, sacrifice it.

Adarkar Wastes

{T}: Add {C}.
{T}: Add {W} or {U}. Adarkar Wastes deals 1 damage to you.

Muscle Sliver

Meddling Mage

As Meddling Mage enters, choose a nonland card name.
Spells with the chosen name can't be cast.

Acidic Sliver

All Slivers have "{2}, Sacrifice this permanent: This permanent deals 2 damage to any target."

Duress

Target opponent reveals their hand. You choose a noncreature, nonland card from it. That player discards that card.

Reflecting Pool

{T}: Add one mana of any type that a land you control could produce.

Underground River

{T}: Add {C}.
{T}: Add {U} or {B}. Underground River deals 1 damage to you.

Mox Diamond

If Mox Diamond would enter, you may discard a land card instead. If you do, put Mox Diamond onto the battlefield. If you don't, put it into its owner's graveyard.
{T}: Add one mana of any color.

Counterspell

City of Brass

Whenever City of Brass becomes tapped, it deals 1 damage to you.
{T}: Add one mana of any color.

Undiscovered Paradise

{T}: Add one mana of any color. During your next untap step, as you untap your permanents, return Undiscovered Paradise to its owner's hand.

Hibernation Sliver

All Slivers have "Pay 2 life: Return this permanent to its owner's hand."

Winter Orb

As long as Winter Orb is untapped, players can't untap more than one land during their untap steps.

Engineered Plague

As Engineered Plague enters, choose a creature type.
All creatures of the chosen type get -1/-1.

Seal of Cleansing

Sacrifice Seal of Cleansing: Destroy target artifact or enchantment.

Worship

If you control a creature, damage that would reduce your life total to less than 1 reduces it to 1 instead.

Winged Sliver

Hydroblast

Choose one —
• Counter target spell if it's red.
• Destroy target permanent if it's red.

Crystalline Sliver

All Slivers have shroud. (They can't be the targets of spells or abilities.)

Pyroblast

Choose one —
• Counter target spell if it's blue.
• Destroy target permanent if it's blue.