This just cancels forms and casts rejuvenation so there is no messing around cancelling whatever form you are in then casting. Obviously change “!rejuvenation” for whichever spell you are making a macro for.
/cancelaura aquatic form
/cancelaura cat form
/cancelaura travel form
/cancelaura bear form
I think the ! is a priority thing. I know in macros like /cast !Shoot that will allow you to spam the button and start using your wand (in classic) but not cancel wanding if you keep pressing it. The normal functionality of the button to shoot with wand is that one press starts shooting, second press stops, making it impossible to spam the shoot button because you’ll just keep cancelling and restarting it before making a single shot. the ! stops that from happening and makes it an “on only” key. I imagine that with a spell like Rejuvenation or Renew, you can use it without cancelling it if you spam it.
Its not really needed in this case. More so in something like
/cast !Cat Form or /cast !Bear Form
In the game if you hit bear form once, you turn into a bear, if you hit it again you leave bear form. The ! in front of it makes it spammable, or able to bing it to say mousewheel, and then it will always make sure your in bear form or cat form and not go into it and then right back out again.