Yeah, I can totally see where you’re coming from. I felt dirty doing it.
Manufactured Truth doesn’t keep anything about the base card (not illusion status or anything else). If you turn an Aven into a BK, it still has arrival fatigue (because you didn’t control it at the start of the turn), and it’s considered to be a Tech I card, and not an illusion (so you can target it without it popping). Units still keep any damage or runes, as it’s only the base stats of the card which change.
Here BK attacks with Readiness, which means it doesn’t exhaust. The rules say a unit with Readiness can’t attack more than once each turn. But once he turns into a Stewardess, he doesn’t have Readiness anymore, so that rule no longer applies. For a Stewardess, the only requirements are that it was in play at the start of the turn (so it doesn’t have arrival fatigue) and that it’s not exhausted. As a Stewardess, he fulfills both requirements to be able to attack, and so can attack again. There’s no check in the game when a unit wants to attack to say ‘Has this unit already attacked?’, otherwise Ready or Not and Rampaging Elephant wouldn’t allow multiple attacks either.
On the other hand, if the powers that be had decided that when a unit with Readiness attacks, that creates an effect on that unit which says ‘You can’t attack again this turn’, I would have been fine with that. However, instead they decided that if a unit has Readiness it checks to see if it’s already attacked this turn, and if it has, then it can’t attack again.
I get that it doesn’t feel good though, and my intention is totally not to exploit a rule loophole to do something illegal. I’m happy to replay my turn as if it wasn’t possible to do that (though I doubt that will remove the general bad feeling), or to just call the game here and move on to the next one.
If you’ve had enough, and don’t want to play against me in the series any more, that’s fine too. You’ve showed phenomenal resilience in the face of constant defeat, and I’m happy to hand Blue over to someone else to carry on. I think you probably understand the Purple side of this matchup better than most other players, and you might get a turn to steam-roller someone else too!