[Repost] Rare chest back to back and 2 rare chests at once or any chest can be rare [Reposted for smartphone users and future reference]
Placing these here to more easily find again.
Reports of back to back, and two at once, for rare chests ( Wanted elemental mission chests)
Rare chest appears to be merciless RNG which is core to the game design of Empires v1.0 .
So data supports the idea that any chest can be rare.