16 printings of Opal Palace
They range from $0.19 to $1.58 — a 8× difference for a card with the same name. The set code and collector number printed along the bottom edge are what tell them apart.
| Warhammer 40,000 Commander | 40K 286★ | — |
| Commander Legends | CMR 707 | $1.58 |
| Commander 2016 | C16 312 | $0.59 |
| Commander Anthology Volume II | CM2 259 | $0.39 |
| Lorwyn Eclipsed Commander | ECC 156 | $0.36 |
| Warhammer 40,000 Commander | 40K 286 | $0.36 |
| Neon Dynasty Commander | NEC 172 | $0.31 |
| Commander 2021 | C21 306 | $0.28 |
| Commander 2013 | C13 310 | $0.28 |
| Modern Horizons 3 Commander | M3C 361 | $0.27 |
| Kaldheim Commander | KHC 116 | $0.27 |
| Secrets of Strixhaven Commander | SOC 390 | $0.27 |
| Commander 2017 | C17 266 | $0.26 |
| Commander Masters | CMM 422 | $0.22 |
| Commander Legends | CMR 352 | $0.19 |
Not sure which one you are holding? OtterDex reads the set code and collector number off the card and tells you.