The Latin equivalent of the English phrase 'from here on' is hinc porro. In the word-by-word translation, the adverb 'hinc' means 'from here, hence'. The adverb 'porro' means 'forward, further'.
eratis is a helping verb, not a complete phrase in and of itself. It is the imperfect, 2nd person plural form of sum, esse, fui (to be), and means "were" when being used with a 2nd person plural...