Eidolon of Rhetoric

Each player can't cast more than one spell each turn.

Smokestack

At the beginning of your upkeep, you may put a soot counter on Smokestack.
At the beginning of each player's upkeep, that player sacrifices a permanent of their choice for each soot counter on Smokestack.

Drannith Magistrate

Your opponents can't cast spells from anywhere other than their hands.

Ravages of War

Smothering Tithe

Whenever an opponent draws a card, that player may pay {2}. If the player doesn't, you create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")

Torpor Orb

Creatures entering don't cause abilities to trigger.

Cyclonic Rift

Return target nonland permanent you don't control to its owner's hand.
Overload {6}{U} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

Static Orb

As long as Static Orb is untapped, players can't untap more than two permanents during their untap steps.

Null Rod

Activated abilities of artifacts can't be activated.

Stasis

Players skip their untap steps.
At the beginning of your upkeep, sacrifice Stasis unless you pay {U}.

Back to Basics

Nonbasic lands don't untap during their controllers' untap steps.

Winter Orb

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

Armageddon

Rhystic Study

Whenever an opponent casts a spell, you may draw a card unless that player pays {1}.

Linvala, Keeper of Silence

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

Hanna, Ship's Navigator

{1}{W}{U}, {T}: Return target artifact or enchantment card from your graveyard to your hand.

Rule of Law

Mana Breach

Whenever a player casts a spell, that player returns a land they control to its owner's hand.

Stony Silence

Humility

All creatures lose all abilities and have base power and toughness 1/1.

Rising Waters

Lands don't untap during their controllers' untap steps.
At the beginning of each player's upkeep, that player untaps a land they control.