[quote=Beta]
To be perfectly honest I wondered why you were even arguing it, due to the fact I pointed out using her 0-turn abilities instead of the big fuck-you card that I still think you're half-assed metagaming to avoid.
[/quote]

I honestly thought you believed the prepping mechanics to work like that, it's not really something I could avoid trying to explain. But you know, glad that wasn't the case.

As for half-assed metagaming, I had two approaches to chose from; 

Edmund would either spot Ysolda (sensors all over, remember?), fuck her shit up with the mecha tail before she could even start chanting, disrupting or at least delaying the prep, then, with the knowledge that Ysolda can dodge the fuck out of anything non-aoe, blast a drill into the ground and detonate it. Nuclear explosion, much less climatic. 

Or, get a call from HQ, and under the false belief that he had already vanquished his foes and the city, abandon his mecha, and detonate it to prevent anyone from stealing or replicating it. Nuclear explosion, less climatic, but good tie-in to future battles. 

As for future reference, if you would refrain from announcing your moves ahead of time like you did, people can carry out actions they would do anyway without fear of meta-gaming. What else was I to do, stomp your dude (who can dodge energy beams and missiles) with my slow ass mech?