They still havent found it
Brawl Legal Vintage Legal Timeless Legal Commander Legal Pauper Not Legal Oathbreaker Legal Penny Legal Toolbox Buy This Card Notes and Rules Information for Assault on Osgiliath: If you choose a value of 0 for X while you don't control an Army, you will create a 0/0 Orc Army creature token and won't put any counters on it
Basically, while the actual milling effect of Compelling Argument isn't good, it's a fine card thanks to the ability to turn it into a more useful card for just one mana, while also giving us some late-game upside of milling our opponent when they are almost out of cards
You should be able to exile their entire library pretty quickly
Some spells I like for this approach are Eidolon of Rhetoric, Ethersworn Canonist, and Rule of Law
Plus we can still deal with anything our opponent throws at us thanks to Dragon Fire and Maui - Hero to All