A newly discovered star is unlike any ever found. With an outermost layer of 99.9 percent pure oxygen, its atmosphere is the most oxygen-rich in the known universe. Heck, it makes Earth's meager 21 percent look downright suffocating.
It'd be way too hot for us to try breathing it anywise.
One cubic centimeter of that atmosphere would weigh on the order of one metric ton, so if you filled your lungs with it, you’d have several thousand tons of searing hot oxygen in them. Ouch!