The Charm of Versatile Skills is a major Utility charm from the Iki Island expansion in Ghost of Tsushima. Doubles a minor charm's effect when no other minor charm from the same category is equipped. You get it by raising your Legend to Legacy Redeemer.
Your Legend grows as you finish tales, free territory and help people. Hit the rank Legacy Redeemer during the Iki Island story and the charm is added to your gear.
Build around it by equipping one minor charm from each of the five categories.
A Scrawled Message
A Scrawled Message is a written record from the Records of Iki set, left by locals during the Mongol invasion. You find it at a camp south of Lake Nagata on Iki Island, and it counts toward the Avid Reader trophy.
Attached to an Old Crate
Attached to an Old Crate is a written record from the Records of Iki set, left by locals during the Mongol invasion. You find it at a shed northwest of Lone Spirit Fall on Iki Island, and it counts toward the Avid Reader trophy.
Image: Sucker Punch Productions / PlayStationBamboo Strikes
Bamboo Strikes are button-timing challenges where Jin slices a row of bamboo poles. There are 20 in all, 16 on Tsushima and 4 on Iki, and completing them raises your maximum Resolve.
Beware the Tengu-Masked Archer
Beware the Tengu-Masked Archer is a written record from the Records of Iki set, left by locals during the Mongol invasion. You find it at a house in Yahata Forest on Iki Island, and it counts toward the Avid Reader trophy.