Puppet Master

Enchant creature
When enchanted creature dies, return that card to its owner's hand. If that card is returned to its owner's hand this way, you may pay {U}{U}{U}. If you do, return this card to its owner's hand.

Chronicles Foreign Black Border

Chronicles

If target creature is put into the graveyard, return it to its owner's hand.
o
Uo
Uoo
U Return Puppet Master to its owner's hand. Use this ability only when the creature Puppet Master enchants returns to its owner's hand.

Legends

If target creature is placed in the graveyard, return creature to owner's hand. All enchantments on target creature are destroyed. You may pay o
Uo
Uo
U to return Puppet Master to its owner's hand if target creature returns to its owner's hand.

You only get the opportunity to pay {U}{U}{U} (and thus to return Puppet Master to its owner's hand) if the creature card actually gets returned to its owner's hand. If it isn't (for instance, if it was removed from the graveyard prior to this ability resolving), you don't get the option to pay.