I am making my cleric (5th level character) persistent spell list and I would like to make Cloud of Knives persistent. And as tremendously good as it sounds in terms of combat (will have a few buffs to increase damage rolls which would benefit this spell a lot), my concerns lie in social aspects.
I mean, there is a cloud of knives constantly flying around me, that would certainly make a lot of people wary of my character and even hostile or suspicious, like guards for instance. Not to mention sleeping and eating while this spell active and stuff like "tripping and being cut by my own dagger", you know, the stuff a DM can come up with.
The partial solution I came up with is using either the Invisible spell feat or Lesser Metamagic Rod of Invisible Spell (would help with a few other persistent spells). This should prevent NPC from freaking out about daggers (except for cases where an NPC can accidentally impale themselves upon them in small room or close to me etc.) and it would benefit me in combat greatly, since enemies will have to figure out what's hitting them, before trying some stuff like Dispel Magic etc.
But concerns with the DM messing with tripping and cutting myself with invisible spell grows even bigger now, so are mundane things like sleeping, eating and interacting with other characters at close range.
I kind of have possible solution to this - permanent detect magic, but it seems like that would not work out, since I have to concentrate to actually detect magic and I'm not detecting it all the time. And judging by the Cloud of Knives spell description, I don't have control over how the daggers fly whatsoever (though they just kind of float in air, which does not imply, that they are flying around me, maybe just hanging in air) except for attacking with them and rotating them to direction where I look.
So are there any means, that I've missed that would make RP with these daggers a bit easier?