Deafening Silence

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

Rule of Law

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

Kodama of the East Tree

Reach
Whenever another permanent you control enters, if it wasn't put onto the battlefield with this ability, you may put a permanent card with equal or lesser mana value from your hand onto the battlefield.
Partner (You can have two commanders if both have partner.)

Archon of Emeria

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

Spirit of the Labyrinth

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

Eidolon of Rhetoric

Grand Abolisher

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