[Exxy]

For what purpose or is this just a random idea?

It would bring a small sense of inter-connectivity to Wind and Earth magic along with providing another mechanic/strategy to use in battle.

Personally, I think the idea is good and would be up for something like this (although the idea of it creating special tiles is something I'm on the fence with; maybe incorporating a debuff/small amount of damage for whatever the respective tile is - Dark Water giving Silence -or- a (very) small round-based Faith debuff for getting soaked in dark water, Sear/Cinder tiles giving burn damage, ice tiles giving Pierce or Ice damage, etc). I could see it adding another layer to combat, depending on how far you're willing to take the idea(s).