The Sapphire Star ( Crystal Star)

The Sapphire Star is the fifth Crystal Star you recieve in the Game Paper Mario The Thousand Year Door. This Crystal is kept by Cortez on Key Haul Island in the Pirates Grotto. After you beat Cortez you still have to beat Lord Crump before you have actually can palce this crystal in the thousand year door and Lord Crump corners the island to steal this paticular Crystal Star from Mario. The reason Cortez gives the Crystal to Mario after you beat him is because he says he doesn't really like the crystal star anyway

Power
The Sapphire Star teaches Mario the move Sweet Feast, which costs five SP. As opposed to Sweet Treat, the player will simply have to hold left instead of repeatedly tapping it. Mario can gain much more  HP and FP using this, but Poison Mushroom are still a threat because there even bigger.