Dungeons/Underwater/Brainstorming

Dungeon

 * Perpetual water-breathing spell
 * Some rooms: water rushes in/out (up/down)
 * Sometimes at intervals
 * Sometimes by mechanic
 * Some waterways
 * Some rooms are structured way different, cause they’re meant to be swam through (gravity and height are much less of a limitation underwater)
 * (perpetual ____ spell) allows faster travel through water