Obtained a weapon socketed with 1 or more shadestones.

Complete Chapter 4.

Swan dive to the hole in the end of Atlantean Stronghold level

Use a chocobo to find two treasures buried by rabbits.

Max out a weapon ability's proficiency.

Invoke a summon.

Level up an orb of materia.

Squeeze in for a medipack

Defeat the third Ruler of Atlantis

Swan dive in a hole with water surrounded by fire

Complete Chapter 1.

Use a limit break.

Free a bound ally.