Even if it just means you eat one of their chump blockers, it still cost them something for your two mana (one to activate, one for the Land the Aura is on)
Brawl Not Legal Vintage Legal Timeless Not Legal Commander Legal Pauper Not Legal Oathbreaker Legal Penny Legal Toolbox Buy This Card Notes and Rules Information for Worldgorger Dragon: If Worldgorger Dragon leaves the battlefield before its enters-the-battlefield ability resolves, the "leaves-the-battlefield" ability will trigger and resolve first
Over on Arena, if you play Historic Brawl, you are no doubt tired of playing against the Etali, Primal Conqueror deck
The best Commander elementals
Emeria's Call is similar but comes with the huge bonus of being a land when you need it
Wizards has often used Un-sets as a safe testing environment for their more daring design ideas, and sometimes those first tests are what end up going to print a few years later