Ajad, Azourius peacekeeper

Hexproof, Seethrough (Each opponent must
reveal their hand to you)
When Ajad, Azorius Peacekeeper enters the battlefield exile seven permanents each opponent controls. When Ajad, Azorius Peacekeeper attacks
you may play up to one of the permanents exiled
by Ajad, Azorius Peacekeeper without paying it's
mana cost