i'm using a wyvern, with a vampiric relic, and an artificer.
I get fairly frequently a crash that ends the game.
what happens is the game just comes to a halt, and i get the message in the
chat window that the AI has won. but the main game screen is just frozen,
with no indicator there.
in these cases, the AI has not actually won either.
I am not 100%, but it appears to be when the computer is close to winning,
but the auto-attack on approach of the wyvern has killed the incoming unit.