The Law Giver Greek theater mask was created for the tragedy, The Eumenides by Aeschylus.
The Law Giver is the leader of the Furies need to impose their own form of savage justice upon the egregious acts of men.
(Chorus of Furies): “You younger gods! The ancient laws—
you have ridden them down! You have taken them out of my hands for yourselves!
I am dishonored, wretch that I am; my heavy rancor releases on this land—woe to it!—a poison, a poison from my heart to requite my grief,
dripping from below the earth, intolerable. From this
a canker destroying leaves, destroying offspring—O Justice [Justice]!—
will sweep over and strike the land
with a blight killing men.”