# Battle XP +2: Strategy Book Study Level 3 research

> Battle XP +2: Strategy Book Study Level 3: Required Materials. Timber, Iron Ore

Canonical: https://lostark.wiki/database/stronghold-research/battle-xp-2-strategy-book-study-level-3-320013?relation=research_materials

"You're already dead."  
Read the bestseller, "Battle Strategy Book."

## Facts

- **Category**: Roster Growth Boost
- **Time Taken**: 0d 02:00:00
- **Required Action Energy**: 700
- **Research Cost**: 170 Gold
- **Stronghold XP gained**: 1,000
- **Research Requirements**: Lab Lv. 2; Character Lv. 55 or above; [Battle XP +2: Strategy Book Study Level 2](https://lostark.wiki/database/stronghold-research/battle-xp-2-strategy-book-study-level-2-320012)

## Related

- [Research Requirements](https://lostark.wiki/database/stronghold-research/battle-xp-2-strategy-book-study-level-3-320013#relationships) (1)
- [Required Materials](https://lostark.wiki/database/stronghold-research/battle-xp-2-strategy-book-study-level-3-320013?relation=research_materials#relationships) (2)

### Required Materials

1–2 of 2

| Name | Quantity | Details |
| --- | --- | --- |
| [Timber](https://lostark.wiki/database/items/timber-6882301) | 14 | Quantity 14 |
| [Iron Ore](https://lostark.wiki/database/items/iron-ore-6882401) | 14 | Quantity 14 |

## Related

- [Home](https://lostark.wiki/)
- [Stronghold Research](https://lostark.wiki/database/stronghold-research)