"Father's Enemy is Avan!? The Ultimate Black Sword of Hatred!!" is the twenty-first episode of the 1991 anime The Adventure of Dai. It first aired on 19 March 1992.
Added that Popp's new wand doubles his magic power
Added scenes of the monsters massacring Hyunckel's village, Bartos actively saves Hyunckel from death. Added scenes of Hyunckel growing up among the monsters and Bartos joking about getting a "medal of honour".
The monster telling Bartos about the hero attack is a skeleton swordsman instead of a skeleton design
Bartos does not hide Hyunckel in a cupboard.
Removed Leira and Loca from the assault on Hadlar's underground palace
Dai's party is suprised claim to use a sword technique beofre removing it from his helmet
On Hyunckel's graduation ceremony, Avan as the same sword design as when he later fought Hadlar on Dermline
Avan has his monologue after jumping in the river. Added a whirlpool in the river.
Warning: Display title "<i>The Adventure of Dai</i> episode 21" overrides earlier display title "Father's Enemy is Avan!? The Ultimate Black Sword of Hatred‼".