Witch of Hope/Land of Iron and Prisms? Please and Thank You! :D
Witch is a hard class to define, personally I have a theory it is a combination of manipulating and preserving space (Feferi preserves fish in her hive, she preserves life by feeding her lusus. Jade preserves the lands and battlefield from her session).
So a witch of hope would probably ensure hope survives, you would personally preserve everyone's hopes, you would maintain your own hope aswell, and if you manage to materialise it, you will ensure its continued existence (for example; Eridan and his science magic, after he died, the science energy went with him), your hope shall continue to exist, even when you aren't influencing it.
(That is a hard class to describe, especially with the lack of witch coverage)
Your land would be made of mines and ironworks, it would be covered in iron ore, the giant prisms will be scattered across the land, some buried under rocks, some out in the open. The refracted light shall shine rainbow light off of them and the iron ore will reflect this, lighting up your planet in colour.
(Hope you like it :3 if you want a personal quest jsut send me another ask :3)