Torpor Orb

Creatures entering the battlefield don't cause abilities to trigger.

Jin-Gitaxias, Core Augur

Flash
At the beginning of your end step, draw seven cards.
Each opponent's maximum hand size is reduced by seven.

Damping Matrix

Activated abilities of artifacts and creatures can't be activated unless they're mana abilities.

Locust Miser

Each opponent's maximum hand size is reduced by two.

Gnat Miser

Each opponent's maximum hand size is reduced by one.

Grand Abolisher

During your turn, your opponents can't cast spells or activate abilities of artifacts, creatures, or enchantments.

Bubble Matrix

Prevent all damage that would be dealt to creatures.

Mycosynth Lattice

All permanents are artifacts in addition to their other types.
All cards that aren't on the battlefield, spells, and permanents are colorless.
Players may spend mana as though it were mana of any color.

City of Solitude

Players can cast spells and activate abilities only during their own turns.

Zur's Weirding

Players play with their hands revealed.
If a player would draw a card, they reveal it instead. Then any other player may pay 2 life. If a player does, put that card into its owner's graveyard. Otherwise, that player draws a card.

Tainted Remedy

If an opponent would gain life, that player loses that much life instead.

Dosan the Falling Leaf

Players can cast spells only during their own turns.

Presence of the Master

Whenever a player casts an enchantment spell, counter it.

March of the Machines

Each noncreature artifact is an artifact creature with power and toughness each equal to its mana value. (Equipment that's a creature can't equip a creature.)

Aggressive Mining

You can't play lands.
Sacrifice a land: Draw two cards. Activate only once each turn.

Conqueror's Flail

Equipped creature gets +1/+1 for each color among permanents you control.
As long as Conqueror's Flail is attached to a creature, your opponents can't cast spells during your turn.
Equip {2}

Linvala, Keeper of Silence

Flying
Activated abilities of creatures your opponents control can't be activated.