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Combat Endurance, Vol 1
This Group Tactics manual teaches Combat Endurance 1. This Group Tactics ability increases the maximum stamina and gamma of all teammates within 30 meters by 5 and their stamina and gamma regeneration by 1. You may only run one aura ability at a time.

Item Level:14
Weight:0.1 kg
Effect:Combat Endurance 1
Teaches Combat Endurance 1
Requirement: Group Tactics 42

Note: Although this skill book still exists in-game and is not a "bug", devs have stated that they will start replacing ability book rewards with chips over time.