You mean an Apex tulpy, when you choose her as a main pred, or generally, because as far as I know you can eat any student pred aside from the apex one (didn't test it yet).
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I see. So it doesn't count as completed? Fair enough, I couldn't tell since I already completed the nightmare mode by that moment. What I would like to know if you can eat Apex Tulpy in 2 preds nightmare mode and then complete it against only one that left. I hope that when Ligeska will become playable, she could devour any apex, considering how big she is.