Panini Phoenix DK Metcalf 'Thunderbirds' Error or Custom Trading Card

This is a standard-sized trading card (2.5" x 3.5") featuring a violet/purple holographic foil finish. The card is titled 'THUNDERBIRDS' at the top and identifies the player at the bottom as 'DK METCALF' for the 'STEELERS'. The card features a high-gloss, premium cardstock construction with a metallic foil treatment that reacts to light. The central graphic depicts a football player in a black and yellow Pittsburgh Steelers uniform (wearing jersey number 4) with stylized silver/white wings extending from behind the player and white lightning bolt motifs flanking the edges. Notably, this item appears to be a manufacturing error, misprint, or a custom-made 'fan art' piece, as DK Metcalf is a prominent wide receiver for the Seattle Seahawks and has never played for the Pittsburgh Steelers. The imagery actually shows Steelers quarterback Justin Fields, further indicating a significant data error on the card. The card is currently housed in a protective soft sleeve inside a rigid plastic top-loader, which has preserved its condition. The corners appear sharp and the edges clean, with no visible surface scratches or 'silvering' on the foil edges. The centering seems slightly shifted toward the right margin. The Panini Phoenix 'fire' logo is present at the bottom center, though the inconsistencies strongly suggest a production anomaly.

I have examined the provided information and imagery for the 'Thunderbirds' card featuring DK Metcalf's name paired with Justin Fields' likeness in a Steelers uniform. Upon review, this item is a 'custom' or 'unauthorized' creation rather than a genuine Panini production error. While Panini occasionally has data mishaps, the 'Thunderbirds' design and the specific player/team mismatch (Fields in a Steelers kit with Metcalf's name) are hallmarks of non-licensed 'fan art' cards frequently found on secondary marketplaces. The high-gloss violet foil and cardstock appear consistent with modern counterfeit or custom printing techniques intended to mimic the Phoenix line. From a condition standpoint, the card appears Mint (MT 9) with sharp corners and clean edges, though centering leans slightly right. However, for sports memorabilia, value is derived from official licensing and scarcity within a tracked checklist. Because this is a third-party custom creation, it lacks 'Error Card' status in the traditional numismatic sense. There is no established auction history for this as a verified rarity; it trades purely as a novelty item for fans of the aesthetic or 'meme' cards. Without physical inspection, I cannot confirm the ink sublimation quality or the weight of the cardstock. A definitive authentication would require microscopic analysis of the rosette printing pattern and UV-light testing of the foil layer to distinguish it from industrial-grade boutique prints. For any professional valuation beyond 'novelty,' provenance proving it originated from a sealed Panini hobby box would be mandatory, though I find that outcome highly improbable given the design inconsistencies.