First build up until you get 2 high templars (or dark) and a arbiter with statis ability. Second merge the 2 high/dark templars.
(if your on fastbuild then u must do this quick/if your on normal build then be patient for merging). 3rd.statis the archon before the body appears in the circle. (a faster way would be to ctrl+1 arbiter and select high/dark templars. hit R+l+t) (If your on slow build then wait for archon to be olmost complete. you shuld see the bar olmost full.)
4th. when they finished merging (making archon) you should see a statis field around archon.
NOTE: this is just a cool graphical glitch. does not supply invincibility
1.Get 1 zergling and 1 arbiter.
3.patrol arbiter so that the invisibility turns on/off for the zergling
4. Right when you think your zergling is about to be cloaked,unburrow it.
NOTE: if done right your zergling should be permanently invisible.