Wizards (1977)

A fantasy science fiction by Ralph Bakshi.
After nuclear bombs wipe out the world, mutants dwell in radiated areas and magical folk live in the good lands. A faery queen gives birth to 2 wizards, one good and one evil. The evil wizard goes to the mutant areas and builds an army while the good wizard travels the land helping people. After their mother dies, the wizards have a conflict to the death.
This is one of my favorite films. It's a toss-up between this and The Princess Bride. Both offer fantasy and adventure with lots of variety and epic quests. The animation in this mixes rotoscoping with regular cartoon style animation at will and it turns out for the better. The plot is epic and the characters are unforgettable. I'm rating this best because it's one of my favorites and my first review didn't do it justice at all.