Lorick #152:

a carpenter, thatcher, and mason

of the three, two were murderously chastened

but their big wily foe,

when it had a third go,

learned too late 'twas its own death it hastened

But first, we solve #153 - here it is one last time:

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!