Mesle, Mellifluous Minstrel

Indestructible
At the beginning of your upkeep, if Mesle, Mellifluous Minstrel has no melody counters on it, put a melody counter on it. Otherwise,
remove all melody counters from it.
As long as Mesle has a melody counter on it, prevent all damage that would be dealt.
A song as old as time...