This old cartoon movie had an old man that looks like santa clause and fights evil which I remember was just this huge mass of black and red spreading throughout the world. I was around 6 when I watched it I’m 21 now in 2018. He may of had a staff and used spells.
The Lord Of The Rings (1978)? or Return Of The King (1980)?
Wizards (1977)?
http://www.imdb.com/title/tt0076929/?ref_=nv_sr_2
Little Nemo: Adventures in Slumberland! I found it after weeks of searching.
Glad you found it and thanks for letting us know!