In an effort to ensure that the Ethereum Classic Blockchain Proof-of-Work (PoW) mining activities remain profitable, the core crypto currency development team has implemented the latest Fork on May 29, 2018. After this Fork, developers expect block regeneration time to be down from 26 seconds to 14 seconds. In addition, network mining difficulties are also expected to decrease further.
Hardfork has been done at a block height of 5,900,000, and Ethereum Classic developers will change most of the ETC protocols. That is, the code has been updated so that miners must upgrade their Blockchain ETC. This update works to reduce mining difficulties and block rewards before switching to consensus algorithms. Anticipating this change, IOHK (Input Output Hong Kong), a developer of Ethereum Classic and Blockchain company, has released Mantis V1.1 upgrade in early May 2018. This action is implemented to ensure all miners have enough time to make the necessary changes.