Luck : +1 => Turn 2 => lab destroyed event !!!

[Eressil3]

Edi said:
Never had my lab burn down on turn 2, but this is the reason why the first commander you recruit should ALWAYS be a mage if you have a dormant or imprisoned pretender. It's easier to prophetize some ranodm schmuck than make a mage out of one.

With my pretender imprisoned in MP, I did my best expansions by recruiting cheap commanders to ferry as most troops as I could to my independants neighbours - not by recruiting mages. Oviously it may vary depending the nation you're playing.
And since noone here seems to complain about such event so early, I think I'll take the risk again