Exactly what the title says; I've played Unidentified Fossil (Ultra Prism Sun/Moon Set, the Item Card that allows you to play Shieldon) twice now and both times immediately caused the game to crash. I'm 100% positive this card is causing a server/game error.
Edit: Upon attempting for a 3rd time, it doesnt appear to always do it. Not sure what the cause is, but it happened twice.
Edit #2: Happened on attempt #4. Card is definitely bugged.
Edited by JASP01, 06 November 2018 - 03:03 AM.