Enolc, Perfect Clone 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

If Enolc is one of two partner commanders, it's a copy of your other commander except it retains its name. (Including mana cost.) If Enolc isn't a commander, you may cast it as though it was a copy of any of your commanders. Partner (You can have two commanders if both have partner.)