Message

(a short piece of copper wire)
Point and whisper a message.
The target you're pointing at (and only the
target) hears it and can whisper back.
If you are familiar with the target, you don't
need line of sight, just a general direction.
Magical silence, 1 foot of stone, 1 inch of
common metal, a thin sheet of lead, or 3 feet of
wood blocks the spell. Spell can round corners,
no need for a straight line.