https://www.chess.com/variants/spell-chess/game/84875123black won in 14 moves
White missed 8. freeze@e7 Bg6 and 9. freeze@e7 Bg6.
Premature resignation? White is down a pawn and a jump, but it's playable:
14. jump@d2 Qxc2 Nxc2+
15. Kd1 Nxa3
16. Rb8 Qd8
17. jump@c8 Rxd8+ Kxd8
18. Bd3
https://www.chess.com/variants/spell-chess/game/84875123
black won in 14 moves