I was recently thinking and I saw that there was a scythe in Kingdom Hearts that kinda looked almost exactly like the petal scythe in Era, I'm not sure if it crosses the copyright barrier but it's pretty cool just to point it out anyways, the picture's in the attachment  

No offense but that looks nothing like the petal scythe in era, that one has 2 spikes and the blade at the top whereas eras petals over to a blade