Outsized Might

You have absorbed primeval magic that allows you, despite your relatively small stature, to embody the might of titanic creatures. This grants you the following benefits:

• Little but Mighty. You gain proficiency in either the Athletics or Acrobatics skill.
• Powerful Build. You count as one size larger when determining your carrying capacity and the amount you can push, drag, or lift.
• Stalwart. You have advantage on saving throws against being moved or knocked prone.

name = 'Outsized Might'
description = "***Feat: Outsized Might.*** You have absorbed primeval magic that allows you, despite your relatively small stature, to embody the might of titanic creatures."
def prereq(npc): return npc.size == 'Small'
def apply(npc):
    skill = choose("Choose a skill: ", ['Athletics', 'Acrobatics'])
    npc.proficiencies.append(skill)

    npc.traits.append("***Powerful Build.*** You count as one size larger when determining your carrying capacity and the amount you can push, drag, or lift.")

    npc.traits.append("***Stalwart.*** You have advantage on saving throws against being moved or knocked prone.")