Yet another test from the archive.
Demon Arrow effect does not overwrite Acid Bolt effect.
Here's a test I did:
Checked a Goblin Mugger, and it checks as simply "low evasion" (no defense message).
Equipped a Spike Necklace+Royal's Knight's Belt and it checks as "low evasion, low defense".
Removed the necklace/belt and shot it with an Acid Bolt, then a Demon Arrow. It remained "low evasion, low defense".
If Demon effect did overwrite Acid effect, the mob would have returned to just "low evasion" (no defense message) after hitting it with a Demon Arrow.
Here's a test I did:
Checked a Goblin Mugger, and it checks as simply "low evasion" (no defense message).
Equipped a Spike Necklace+Royal's Knight's Belt and it checks as "low evasion, low defense".
Removed the necklace/belt and shot it with an Acid Bolt, then a Demon Arrow. It remained "low evasion, low defense".
If Demon effect did overwrite Acid effect, the mob would have returned to just "low evasion" (no defense message) after hitting it with a Demon Arrow.