I started the final stage of the Snow Wraith try-out event and somehow it put me into Arena?
I kept getting the error captured here after every turn:
After clearing the error each turn, it would change the spirit levels and health of all dragons, and a few times changed special tiles on the board.
When the last dragon was down to no health, it wouldn’t end the game. I had to flee twice, then got a victory message for arena.
I ended up winning an arena battle with a dragon I don’t own, so no harm there. Just thought this one was bizarre enough to report.