transformational
adjective
uk/ˌtrænsfəˈmeɪʃənəl/ (also transformative)able to produce a big change or improvement in a situation:
Action to encourage home insulation by the EU represents a potentially transformational event for government-funded installation agencies.
a transformational acquisition/deal/merger
a transformational strategy/reform/step The company's chief executive described the transaction as a "transformational step" in implementing new corporate strategy.
transformative ideas/experiences