Evarb (2016)

3 children who, while cleaning an attic, stumble upon a secret passageway that transports them across realms to a land called EVARB. While in EVARB they meet up with a group of children who are natives of EVARB. The leaders of the group tell them of a prophecy fortelling of the arrival of 3 children who have the power to pull the mysterious diamonds from the ground.