The Mule has 26 hearts life but it can regenerate only up to 11. I found that bug on a video about the new snapshot (13w19a).
http://youtu.be/PaJzIM1pXgU?t=4m49s
The bug appears on 4:49.
MC-15488
Mule has 26 hearts.
Resolved
Duplicate
0
Duplicate of MC-14097, please use the search function to see if your bug has already been submitted. Currently over 55% of tickets are being closed as duplicate.