MTG  Large Sapphire Medal, Ruby, Emerald Error Charlie Brown 3cards comp set

There's an error on Magic's error card that shows Charlie Brown through the card.

Not all cards have this error, but a small percentage of cards have it.

These are the only three types of error cards that have been identified.

As for the last one, Ruby, it is an error with a vertical and horizontal watermark, but it does not have Charlie Brown.

These three errors are named Charlie Brown errors.