In particular, I'm posting because I could use some help with the Sneaky Bastard's Shadow Clone ability. "You can separate your shadow from your physical self. Your shadow is insubstantial and immaterial, but cannot pass through opaque objects. It is immune to physical damage, but vulnerable to magic and bright lights. Your shadow can hide in the shadow of another creature, and while there you can read their surface thoughts, and communicate with them mentally." My player took the add-on "Multifarious Copies," which lets them change the shadow's physical appearance. I need to house-rule a way to tone this power down, because it overshadows (lol) the other PCs (whose players began to mutter about it being overpowered in our last session).
This thing is the ultimate scout, especially in your typically shadowy dungeon, cave, castle, or other adventure location. It's basically invisible, can't be hurt, can read surface thoughts of any creature, and create moving illusions of other creatures. In practice, the player of this shadow is in charge of all the party's movement in dangerous places; most of my interaction is with that character, asking them where they move the shadow, and telling them what monsters, traps, and dead-ends it sees. I've already ruled that it can only go 150' from its owner, the PC has to test WIL to read thoughts without being detected, and it can't see in perfect darkness (even though I kind of think it should be able to, since it IS a shadow!). How should I change it so that this player still has an awesome shadow power, but one that doesn't disarm so many of the dangers and surprises of adventure locations?
My first thought is limiting the number of uses per day, and the amount of time per use.