Upgrade calculator

Watchtower

Each row is one upgrade: level N → N+1. Totals sum wood, grain, and herbs for steps we have in the guide. Level pickers run through 30; if your target is above the last level with data (currently 20), totals only cover upgrades through that level.

Gear Workshop Raven Workshop

Current level

Target level

My Sanctuary level (optional)

Highlights steps where Sanctuary must be higher (1–30). Other prerequisites are listed per step.

*data can be incorrect too, please verify it before using

Totals for levels 1 → 2

Wood

47,700

Grain

47,700

Herbs

Steps

Data compiled for Last Asylum Guide · Maintainer: Slaughter Queen · Game balance may change with patches.

About Watchtower

Priority: Medium

The Watchtower provides intelligence on incoming attacks, giving you advance warning before enemy marches arrive at your city. Higher levels increase detection range, giving you more time to shield, reinforce, or evacuate troops.

Upgrade Tips

1Always keep your Watchtower upgraded — a few minutes of warning can save millions in resources.
2Higher Watchtower levels reveal more information about incoming marches, including troop counts.
3Upgrade Watchtower before removing a shield in contested territory.