As read on the discussion page http://wiki.ffxiclopedia.org/wiki/Talk:Tsar%27s_Egg for this item on wiki from Aurikasura saying was like a desyth with high hq rate and high break rate is correct from my experience. At 95 GS skill: 4 HQ eggs, 1 NQ and 16 breaks of various degrees of suckyness (always lost at least 1 item) but not even one .1 skill-up. All on darksday, facing west,adv.synth support, less than 70% moon, and no guild items.