VADER: On stage with BLYND and VOMITILE to perform a cover song

The official announcement of N4F Concerts from facebook:
We all know which song VADER are famous for covering at their shows !!!
Wanting to make something special , we decided that for
- Unholy Trinity 2014 - VADER will share the stage in a special formation with members from Blynd and Vomitile to perform that song !!
A small surprise for everyone attending the show !