WarpMyMind

Can this be used with centaur forms? Like cattaurs and Chakats?

Even dragons

Okay I've got one more question, how often is it wise to 'test' the trigger? Like if I test it once a day is there a possibility that that could impede progress?

That just depends on what going under is like for you. According to EMG and a few other of our 'pros' around here, it's best that you don't remember a given trance after the induction, that you've made your conscious mind so dimmed down that you don't remember what exactly has been said after you're told to wake up.

If you're at this point already (I'm sure not), then probably listen 2 or 3 more times and, in a nice private place, ideally, give the trigger phrase a try.

If you're not, then it's probably best to listen a lot more and try it after a while just to see.