Slobad, Actually Just Fine is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

You can sacrifice creatures and artifacts interchangeably. (If an effect asks you to sacrifice one of them, you can sacrifice either.) , , Sacrifice another artifact or creature: Put a rebuilding counter on Slobad. , Remove 3 Rebuilding Counters from Slobad: Create a token that's a copy of Bosh, Iron Golem.