@JeremyECrawford Find Familiar during combat: " as an Action you can see through your familiar's eyes and hear what it hears "
Can I roll a Perception check? (or not because I've already use my Action?)
Do I roll it with the familiar's Perception modifier, or my own modifier?
— Draconis (@DerynDraconis) January 30, 2018
During combat, searching for something requires your action, whether you're using Investigation or Perception. You therefore can't take the Search action and use your familiar's eyes/ears on the same turn, unless you have an extra action from a feature like Action Surge. #DnD https://t.co/8agSiDiWPP
— Jeremy Crawford (@JeremyECrawford) January 30, 2018