You can pay to turn a morph creature face up at any time - it doesn't use the stack and cannot be interacted with - so while you might think you're safe to combo you should be wary of anyone else with a face-down creature
Mana burn hasn't been part of the game in quite some time, but it's funny, and perhaps appropriate that a silver-bordered card is the only one to mention this archaic rule
Shes gonna be easy to build, fun (for you) to play, and I expect to see her a lot
Note that we dissociate this type of deceptive inking from accidental inking (the small stroke of felt-tip pen in the middle of the card, or ink on a sleeve that has rubbed off), to which we also give the Inked status, but which we note as Print lines This card has a clearly visible printline, a minor printing defect which is nevertheless quite frequent, but which will be included in the surface score
I believe rage-quitting also breaks the social agreement that you made when you agreed to sit down to a game