Lorick #151:

he's a guardian who never asks why

...likes a bone and a nice lullaby

he has multiple heads;

keeps the live from the dead...

his a labour not many would try!

But first, we solve #152 - here it is one last time:

every lifespan's a treasure

one we'll stretch and then measure -

weird judges, we three

that live by THE tree -

without malice dispensing displeasure