Assalamu alaikum wa rahmatullahi wa barakatuh, Someone who claims knowledge of the unseen while knowing that he is lying, is such a person considered a kafir? And is his ruling the same as that of someone who claims to be a prophet? JazakAllahu khayran.

Ustadh AbdulAziz al-Haqqan
Claiming knowledge of that which only Allah knows, Al Ghaib (the unseen), is major kufr.