I've been thinking about making an entire core set that's based on the Philippines (I have Filipino ancestry), but it's so much work to come up with that much content. I've been throwing around various ideas but the one archetype I keep coming back to would be based on the old kedatuan (basically like kingdoms or city-states) from before Spanish colonization. The gimmick would be that there would be a series of Field Spells that through their own effect could be moved to the main S/T Zone, and had different effects based on that, and the monsters would be sailors and boats. Basically meaning to emulate sailing throughout the various kingdoms that were spread across the Philippine islands in pre-colonial times.