The shard chests are de-spawned at the moment. They usually appear once or twice a year. I'd quite like a buff that gave a small chance of a shard chest spawning on entering a map per hour, per player, per realm, visited over a certain map size. Anyhoo, that's probably exploitable and wishful thinking.
As for the normal ones that take loyalty points or gold to open, explore smaller realms more than larger ones.
- Croscahd likes this