Yaarel
🇮🇱 🇺🇦 He-Mage
Yes. But.Thanks for this. Why I like the idea of a Passive Investigation is that by calling for a roll, the DM makes the player suspicious, and it will change the action (and slow the game). A passive check allows the DM to say, at the start of the character's turn (maybe after others have gone) "The door is a dim outline, and you see three goblins with shortbows standing in the doorway."
It means the DM isn't describing the PC's mental state (you think something's amiss...) andthere's a clear response for player illusions (without "one of the orcs is naturally suspicious"). The passive check solves all of that.
A passive check is problematic in the sense, characters (PCs and monsters) with high Intelligence become defacto immune to illusions.
Ideally, I would like any character to potentially fall for an illusion.
Most helpful is determining when a character becomes suspicious.
Dealing with illusions is similar to dealing with traps. I dont want traps to be auto-detected. But also, I dont want a game of paranoid "ten foot poles".
I want rules that are clear but excellent.