Please note that some information on this wiki is still based on the demo version.
If you notice any errors, feel free to correct them.

General

From Super Fantasy Kingdom Official Wiki

The General let's you promote a Unit during the day for 1 Berry in the Human kingdom and 1 Rat (dead) in the Undead kingdom, the promotion itself costs the normal price per Unit.

Day Promotion

Promotion costs during the Day in another’s Kingdom differ per kingdom of Human and Undead.
If the Unit is in it's own kingdom it will have specific promotion costs unique in that kingdom to them

Costs human Kingdom
PromotionCosts
3 ×  Ingot
6 ×  Ingot
10 ×  Ingot
Costs undead Kingdom
PromotionCosts
3 ×  Book
6 ×  Book
10 ×  Book
Nightly Tavern Promotion

Promotion costs Inside the Tavern differ per active Curse level.

Tavern Costs
Promotion Curse 0 Curse 1 Curse 2 Curse 3 Curse 4 Curse 5
5 ×  Coins 6 ×  Coins 7 ×  Coins 8 ×  Coins 9 ×  Coins 10 ×  Coins
15 ×  Coins 17 ×  Coins 19 ×  Coins 21 ×  Coins 23 ×  Coins 25 ×  Coins
30 ×  Coins 34 ×  Coins 38 ×  Coins 42 ×  Coins 46 ×  Coins 50 ×  Coins

This page is a work in progress, may miss some content and will change.