The Warrior Stone (Skyrim)

Effect

The stone improves combat associated skills 20% faster. The Warrior skills are:

Block
Heavy Armor
One-Handed
Smithing
Two-Handed

Location

After completing Unbound, continue to follow either Ralof or Hadvar and they will lead you to it. It is located southwest of Riverwood, and north-northwest of Helgen close to the river.

The Mage Stone and The Thief Stone can be found at the same place.
Trivia

Despite Archery falling under The Warrior skill set, it is counted as a stealth skill and covered by The Thief Stone in this instance only. It is unknown if this is intentional or a bug.

The Warrior Stone
Map
Constellation
Location	Southwest of Riverwood.
Description	Those under the sign of the Warrior will learn all combat skills 20% faster.
Effect	Learn combat skills 20% faster