1. Turn on gems
In the panel, open the Gathering tab and turn on Gems in the Resources list. Gems have no level setting: free mines of every level are searched on the map. If gold, stone, wood or food are on as well, a free army goes in the order set in Assignment priority.
2. Pick the search area
The Search area in the Gem search card is the zone scanned around your city, equally in every direction (from 5×5 to 21×21). A bigger area finds more mines, but the scan takes longer and armies march further. If there are few mines nearby, make it bigger; if there are many, a small area is faster.
Minimum reserves: mines with fewer gems left than this are skipped (0 = off). Use it so armies don't march to nearly empty mines.
3. Turn on chain gathering
With Continue without returning on, when a mine runs out the army moves to the next gem mine nearby without going home, so no time is lost on the road. With it off, the army gathers, returns to the city and is sent out again.
- Chain search area: the area around the mine the army is gathering; the nearest mine is picked.
- Chain length: after this many mines the army is called home, then starts a new chain.
- Return when the load is full: the chain ends when the army's load reaches this share.
- Find the next mine in advance: while the army gathers, the area is scanned and the next mine is reserved for it; when the mine runs out, it moves there without waiting.
4. Read your farm presets
In the Farm presets card, press Read from game: Fenrir reads the army presets you saved in the game. Pick the ones to use for gathering; they are used in order from 1 to 5. With Only farm commanders gather on, a farm preset is loaded whenever the game picks a war commander.
5. Fenrir remembers mines
It remembers the mines it finds: a new search checks known mines first, then scans around your city ring by ring. Mines your army is already heading to, or that are occupied, are skipped. Places an army can't reach (for example behind a pass your alliance doesn't hold) aren't tried again for a day; you'll see them in the Learned blacklist on the Log tab.
6. Clear the fog
Mines in fog aren't visible. With Clear fog with scouts on in the City tab, idle scouts go to foggy spots around your city, and new mines appear where the fog lifts.
Where do you see the results?
The Panel tab shows your armies and Today's marches; the Log tab has every march and a summary of the last 7 days. Fenrir gathers gems but never spends them: it never presses buttons with a price or a gem icon.