What does Magyar’s victory in Hungary mean?

The sweeping election victory also carries risks, hvg warns:

“Péter Magyar can now govern with the backing of a larger parliamentary group than Orbán had behind him. Secured by a two-thirds majority, his mandate allows for a change of system without restrictions. … Will Péter Magyar be able to resist the allure of power? This is what he promised on Sunday evening, high on victory. But will he succeed in creating and upholding checks and balances that tie his hands when he runs into difficulties? The changing world order will present the next cabinet with unprecedented challenges, not to mention the plundered state coffers, the unsustainable benefit system for government lackeys and people’s impossibly high expectations.”