Lesser Fiend

Edison Card Text
As long as this monster remains face-up on the field, monsters destroyed by this monster in battle are removed from play instead of being sent to the Graveyard.
Legacy of Darkness • 2004-12-01
No targeting
No Damage Step effect
Banlist • Unlimited
Interactions
Is Lesser Fiend an Archfiend monster in Edison?!
A player checks whether Lesser Fiend belongs to the Archfiend archetype.
Yes. Lesser Fiend is treated as an Archfiend monster.
Rulings
edisonformat.net
●(This card is always treated as an Archfiend card)
●Monsters destroyed by this card as a result of battle are not sent to the GY, so Sangan or Mystic Tomato would not have their effects activated, and the effect of Kycoo the Ghost Destroyer won't prevent them from being removed from play.
●This card does not negate the effects of monsters it destroys as a result of battle, so a Flip Effect like Cyber Jar or Trigger Effect like D.D. Warrior Lady will still be activated. Cyber Jar would still be removed from play in this example, since damage calculation occurs normally.
●If Lesser Fiend battles with Relinquished equipped with a Monster Card, and that equipped card is destroyed instead of Relinquished, it is not removed from play since it is the effect of Relinquished that destroyed it and not as a result of battle with Lesser Fiend.
edisonformat.com
Monsters destroyed by this card as a result of battle are not sent to the Graveyard, so "Sangan" or "Mystic Tomato" would not have their effects activated, and the effect of "Kycoo the Ghost Destroyer" will not prevent them from being removed from play.
This card does not negate the effects of monsters it destroys as a result of battle, so a Flip Effect like "Cyber Jar" or Trigger Effect like "D.D. Warrior Lady" will still be activated. "Cyber Jar" would still be removed from play in this example, since damage calculation occurs normally.
If "Lesser Fiend" battles with "Relinquished" equipped with a Monster Card, and that equipped card is destroyed instead of "Relinquished", it is not removed from play since it is the effect of "Relinquished" that destroyed it and not as a result of battle with "Lesser Fiend".