Deafening Silence

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

Aven Mindcensor

Flash
Flying
If an opponent would search a library, that player searches the top four cards of that library instead.

Each player can't cast more than one non-Phyrexian spell each turn.
Non-Phyrexian creatures enter tapped.

First strike
Noncreature spells cost {1} more to cast.

Each player can't draw more than one card each turn.

First strike
Creatures and nonbasic lands your opponents control enter tapped.

Artifacts your opponents control enter tapped.
{X}{X}{W}, Sacrifice Dauntless Dismantler: Destroy each artifact with mana value X.

Activated abilities of artifacts can't be activated.

Flying
Each player can't cast more than one spell each turn.
Nonbasic lands your opponents control enter tapped.