If you truly want an "unfair" advantage, buy the or Permanent Boost from the in-game store for a few dollars. It supports the developers who created this wonderfully twisted world, and it’s the only hack that won’t get your Devourer expelled from the graveyard.
You don't need a hack. The game offers three reliable gem sources: NecroMerger - Idle Merge Game Hack
NecroMerger is primarily a mobile game (iOS/Android) with cloud saving. To use Cheat Engine, you would need to run the game on an Android emulator (like Bluestacks or LDPlayer) on your PC. From there, you could theoretically scan for the memory address of your current mana count. If you truly want an "unfair" advantage, buy