It's a joke.
I leveled a barb just to make sure, and it doesn't do shit.
Don't waste your time lol.
You have no idea what you're doing lol. You can't just get 200 fcr and spam portals, that won't do anything but make you look stupid. You need to do bportal glitch as well. Then afterwards the portals take up space and compound on top of each other, making a "void" where monsters try to spawn and cannot and thus are instantly killed.
If that doesn't explain it for you idk what else will. It's like trying to use auradin from 1.12 and not knowing how to aura stack with trade screen.