due to different number of devices hours each product was stress tested to. The FIT numbers are reported when the reliability report is generated. Please refer to the latest reliability reports for the latest FIT values. http://www.sitime.com/support/quality-and-reliability#magictabs_eDH8P_3....
Sort of obsoleted with Gift of Immortality in Theros if you’re using it for, well, immortality. Okay, it came out a good few years before that, and is a different colour, and doesn’t allow for stealing creatures. Still, with what it does, one can’t help feeling like it just does...