Alhammarret, High Arbiter
{5}{U}{U}
Legendary Creature -- Sphinx
5/5
Flying
As ~this~ enters, each opponent reveals their hand. You choose the name of a nonland card revealed this way.
Your opponents can't cast spells with the chosen name (as long as ~this~ is on the battlefield).
Council of the Absolute
{2}{W}{U}
Creature -- Human Advisor
2/4
As ~this~ enters, choose a noncreature, nonland card name.
Your opponents can't cast spells with the chosen name.
Spells with the chosen name you cast cost {2} less to cast.
Gideon's Intervention
{2}{W}{W}
Enchantment
As ~this~ enters, choose a card name.
Your opponents can't cast spells with the chosen name.
Prevent all damage that would be dealt to you and permanents you control by sources with the chosen name.