Drop Chance 1/286225 B2B Dragon Plateskirt
Back to back Dragon Plateskirts
Drop Rate 1/535
1/535 * 1/535 = 3.493754913*10^-6%
Which is 1/286225 -- www.twitch.tv/dextiz/c/4214831&utm_campaign=archive_export&utm_source=dextiz&utm_medium=youtube