Tune Guitar to judas Priest.
Start with the LOw 6th String. It should tune to E Natural.
Power Chord 2 fingers index on 7th fret 5th strg
Ring 9th 4th
Hit it and you realize that this chord is slide up to from the 5th and 7th fret. hit it once
then slide it to the 7th and 9th (strings 5 and 4)