4 printings of Body of Knowledge
They range from $0.33 to $2.14 — a 6× difference for a card with the same name. The set code and collector number printed along the bottom edge are what tell them apart.
| Commander Legends | CMR 631 | $2.14 |
| Commander Legends | CMR 59 | $0.36 |
| Duskmourn: House of Horror Commander | DSC 112 | $0.33 |
Not sure which one you are holding? OtterDex reads the set code and collector number off the card and tells you.