Copycat

Subclass featureValdaSpire24Extras2014Witch

You can copy a creature's skills, in addition to its magic. When you see a creature within 60 feet of yourself makes an ability check using a skill or a saving throw in which it has proficiency, you can take a Reaction to duplicate that proficiency. Until you finish a Long Rest, you have proficiency in that skill or saving throw and can use the creature's bonus whenever you make that roll.

Raw data

{
  "name": "Copycat",
  "level": 10,
  "__prop": "subclassFeature",
  "header": 2,
  "source": "ValdaSpire24Extras",
  "entries": [
    "You can copy a creature's skills, in addition to its magic. When you see a creature within 60 feet of yourself makes an ability check using a skill or a saving throw in which it has proficiency, you can take a {@variantrule Reaction|XPHB} to duplicate that proficiency. Until you finish a {@variantrule Long Rest|XPHB}, you have proficiency in that skill or saving throw and can use the creature's bonus whenever you make that roll."
  ],
  "className": "Witch",
  "classSource": "ValdaSpire24",
  "subclassSource": "ValdaSpire24Extras",
  "subclassShortName": "Blue"
}