The Magic Necklace in a pendant that increases Intelligence. In Castlevania: Harmony of Dissonance, it increased it by +5, which is a smaller amount than the Mystic Brooch (+15).

Item Data: Magic Necklace
Image Name - Game
Type / Users Attributes / Consume Statistics / Sell Found Notes
Magic Necklace Icon Magic Necklace (Magical Necklace) - Harmony of Dissonance [ edit ]
This magical necklace makes its user wiser. Goods
Juste Belmont 
INT +5
Buy: $5,000 Find: Merchant's shop (Castle Treasury (Castle A))
Rare Drop: Arthro Skeleton