Grassland is a common field in the starter island. Like the forest, it's found on the outer rim of the starter island.
Druid Nakis and Grass Spirits can be found on unclaimed grasslands. Both of the two units can be recruited there.
Forest is the counterpart to the grassland and can be found on the outer rim of starter islands too.
In the forest, there are Druid Nakis too, but instead of the Grass Spirits, there are Forest Spirits which can be found and recruited there.
High grass is the third type of basic field on the starter islands. It's located around the portal
High grass gives access to the powerful Guard Nakis. But as valuable as the field is, it's harder to conquer than the grasslands and forest.
The portal around the magic marsh is surrounded by the magic forest.
The magic marsh is the home of the Elder Spirits. The elder spirit is the only unit recruitable in the magic forest (besides Spotter Nakis).
The swamp is outside of the magic forest in the magic marsh islands.
The swamp is the only area where Nyxis are found. Besides the Nyxis, Elder Spirits can be recruited too in the swamp.
Most of the mysterious wasteland islands are covered with wasteland.
The environment in the wastelands are harsh and only strong creatures can survive there. That's why that's the home of the Pangoans who can be found anywhere on the island.
There are three bridges connecting the sub-islands of the mysterious wasteland.
There is no default option to recruit units on a bridge, except for Spotter Nakis which can be recruited on every recruiting field. And like every basic field, Soulstone mining is possible.
The dunes are on the left and right outer sub-islands of the mysterious wasteland.
The dunes are the home of the aggressive Ranax as well as the Pangoans.
The ash fields are dark places around the portal in the dark desert island.
The powerful Athlas unit can be found and recruited on the ash fields.
Most of the dark desert island is covered with fiery desert fields.
The fiery desert is the home of the Athlas but also Pangoans survive there. Both units can be recruited in that field.