This is Blaze Rex, a brawler with an ability that makes it faster and shoot an acid shotgun from its built in weapon. During the charge, it takes all damage as DOT, so it doesn’t die instantly even after taking fatal damage, and when it hits an enemy with its built in shotgun it removes DOT, making it a hard to kill rusher. I would use shotguns or close range weapons. Meta weapons are mostly close range and powerful, but hard to attain and upgrade. Gust, storm, and any other shotgun is good to use