Worldbreaker Hulk is a “major” event in the Marvel Comics Infinity storyline. It all started when Loki came back to cause all kinds of trouble and stirred up an invasion by starting with Cul Borson, one of Odin’s generals, who already had his own agenda. In this invasion, Hulks were mutated into “Hulk-Wolves.” After some time the world was over run and New Asgardia became known as World Breaker City. One day Beta Ray Bill came by and fought Cul Borson until they both transformed into their true forms (Cul Borson becoming Serpent). The battle then ended when Thor showed up at New Asgardia to offer his help for protecting the Nine Realms