Claws of Tiamat
The Claws of Tiamat are powerful magic artifacts tied to the five types of chromatic dragons. Individually they contain immense power, but together that power can be multiplied and used for incredibly destructive purposes, potentially summoning Tiamat herself.
White Dragon Claw
The White Dragon Claw has powers relating to white dragons and cold. It was cut and polished and turned into an ornamental necklace. Maru the Bard arranged for Uro to have the necklace stolen and delivered to him in New Stormcastle. Maru then delivered the necklace to Clifford Tarvoh at Galoth's Garden.
Blue Dragon Claw
The Blue Dragon Claw has powers relating to blue dragons and lightning. It was affixed to the top of a staff wielded by Archmage Sinnorus III to make use of its potent lightning magic. Sinnorus kept it close to him at all times, and was buried with it in the New Stormcastle catacombs. Clifford Tarvoh stole the Blue Dragon Claw from his skeleton.
Black Dragon Claw
The Black Dragon Claw has powers relating to black dragons and acid. This was kept secure at the temple to Bahamut in the City of Goldmask until the temple was attacked by the chromatic cultists and the golden reliquary containing the Black Dragon Claw was stolen. Elijah Solis and Leo Albright were framed for this crime and sentenced to labor in Meredith Mine. The two remaining chromatic cultists (after they attacked the party in Drain), Akra and Dentratha, delivered this reliquary to Clifford Tarvoh at Galoth's Garden.
Red Dragon Claw
The Red Dragon Claw has powers relating to red dragons and fire. It was made into a dagger with powerful fire powers that was a relic of the Cinderdalian royal family. It was buried with prince Sinnorus in Kord Koldar. Lod Blackstone raised Sinnorus as undead and commanded him to hand over the dagger. When the party fought Lod in Kord Koldar, they took the dagger after killing him. Scorch kept the dagger in his possession until the party met up with Clifford Tarvoh in Galoth's Garden, where he used magic to steal the dagger from him.
Green Dragon Claw
The Green Dragon Claw has powers relating to green dragons and poison. According to Zilora, the Green Dragon Claw is kept in a place called Dreamland in the Feywild. In order to acquire it, Clifford Tarvoh waited for Kalem's Comet to pass over the material plane, opening a portal to the Feywild in Galoth's Garden.