I think it'll simply make a new copy of that creature, and not keep buffs, so damage from dolls can't be copied.
Malignant cells would lose their current ability (which makes them create cells on attack) and gain one to actively create them instead.
Chimera: new +|+ card that absorbs any creatures that appeared after this one was summoned.
And with flying weapons it would be cool, so I hope that's simply possible
