on off hand switch:
cancel event
if {phantom::%player%} is 1:
if {invisible::%player%} is 0:
apply invisibility of tier 1 without particles to player for 99999 seconds
apply hunger of tier 1 without particles to player for 99999 seconds
set {invisible::%player%} to 1
else:
remove invisibility from player
remove hunger effect from player
set {invisible::%player%} to 0