This intrigued me since in the text the mantrin is supposed to use his regular mantra to mantrafy ("to recite/sing" and/or "to charm by reciting a spell") many things, including offerings (to purify them before offering to the deity). There's also this specific paragraph that says:
It seems to me that one's regular mantra is used for all kinds of things on top of one's inventory of other mantras. Does regular mantra refer to a certain mantra given by one's teacher specifically for you to recite regularly? Is this more of one's personal preference, say, the mantra of one's primarily practiced yidam? Maybe it's simply the mantra one is most inclined to recite regularly?“If you seek great accomplishments, you should not subjugate mountain spirits with your regular mantra, and do not protect yourself or others and do not rescue [people] from difficulties or suppress poisons [with it either]. This is not only the case with your regular mantra, and you should not perform [such deeds] with any other mantras either. All your mantras, each according to its use, should not be practiced with any great frequency, and do not contest your magical powers with others.
Many thanks.