Hmmm... Well,
Dayak People
UA: Native Roots
Forests and jungles grant extra yields* but may not be improved\ chopped. Cities gain

production upon

growth, and provide units with unique promotions based on the city's tile
UB: Iban Blacksmith
Replaces forge but may be built everywhere. In addition to being unlocked earlier(at iron working) and costing no maintenance, the Iban blacksmith also grants +1

culture and +1

happiness from mining- based resources in jungles and forests.
UU: Hunter
Replaces Scout but obsoletes at biology. Instead of the scout's promotions, this unit performs a

ranged attack before engaging in melee combat and requires 1 iron to be produced. Additionally, it posses the "Headhunter" and "Native islander" promotions, which make it receive double XP and heal from killing units, and granting extra

strength equal to its level per each melee unit you may have trained.
*
Extra yields: +1

food and +1

gold. +1

gold after economics. If a resource is present, grants +1

culture and +1

gold.
**
Extra promotions:
Flatland plains\ grassland\ tundra: +1

movement if starting the turn on the appropriate terrain.
Flatland Desert\ snow: double movement in the appropriate terrain type.
Hills: no terrain costs on hills.
Forests\ Jungles: double movement in forests and jungles.