{Of course I can tell! Any competent enchanted item or entity can sense when it's being examined. It's like someone staring at you while taking notes. It's very rude. Though I suppose given that you're actually compatible with me, I'll allow it this once.}
Jack's mind raced, adjusting to the realization that Oscar wasn't just sentient. He was aware enough to sense magical analysis.
That suggested an intelligence far beyond simple weapon enchantments.
'How intelligent are you, exactly?'
{Intelligent enough to know you're in way over your head, human. A Soul Warden infiltrating a demon fortress, disguised as one of them, wielding a cursed spear that literally exists to kill demons.}
Jack was quiet for a moment, considering his next words carefully.
'What do you know about the Soul Wardens?'
