Dryad Doll

The Dryad Doll is a War Mode accessory and one of the collectible NPC Dolls and, like all the others, can be placed on the Doll Stand. When it is equipped in a accessory slot you can kill the Dryad. Once she is murdered in this way the Great Giants will move into your world and their lairs are unlocked for 5 minutes, during this time you get the Living Key buff. Afterwards the Dryad will respawn and the giants lairs will close.

Crafting
It can be crafted at a Earthenite Altar with the following ingredients:
 * 100 Earthenite Bars
 * 20 Disastrous Fragments
 * 66 Blight Sacs
 * 250 Silk