RaptorsTallon wrote:'in lieu' means in place of. If you can't strike any blows, you can't do anything in place of them. So I would say no, if you refuse a challenge you can't use the Tesseract.
that was the argument for it actually. The rule says that the model "cannot strike any blows" not that the model lost his attacks. So the player said since, I can not swing at you then I will use the tesseract which is not striking any blows at the
MC.
Thinking about it I can see his point, but i also think that
GW intended the model to not be able to do anything that turn.