Winter Moon

Players can't untap more than one nonbasic land during their untap steps.

Damping Sphere

If a land is tapped for two or more mana, it produces {C} instead of any other type and amount.
Each spell a player casts costs {1} more to cast for each other spell that player has cast this turn.

Weathered Runestone

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

Torpor Orb

Creatures entering don't cause abilities to trigger.

Cursed Totem

Activated abilities of creatures can't be activated.

Void Mirror

Whenever a player casts a spell, if no colored mana was spent to cast it, counter that spell.