Black Sigil: Blade of the Exiled Playthrough Finale: #73 Forbidden Heart, Shape & Spine
They aren't hard at all but this is their Stats.
https://gamefaqs.gamespot.com/ds/9445...
Boss: Forbidden Heart HP: 75000 Strong: Wind, Earth
Boss: Forbidden Shape HP: 16000 Strong: Water, Fire
Boss: Forbidden Spine HP: 10000 Strong: Holy, Dark