Map: Ice Age Sundaland

During the Last Glacial Maximum, the sea was significantly lower. For the most part, coastlines looked pretty much the same as today, but there were a few places where changing sea levels drastically changed the shape of the land.

Maximilian Dörrbecker via Wikipedia

GLOG Class: Arcane Inventor

"Any sufficiently advanced magic is indistinguishable from technology."
--Neil Gershenfield

The spirits called spells operate on theoretically analyzable principles.  Through careful observation you can replicate their effects.
You don't cast spells, you build gadgets! Instead of Magic Dice, your gadgets each have a Power Level. Instead of magical mishaps, your gadgets suffer mechanical failures.