A Gorajo hoardstalker is found within the level 95 Gorajo resource dungeon in the Meilyr Clan district of Prifddinas and above Daemonheim, next to Thok, after unlocking access to the resource dungeon. He gives players a special card daily. These cards are similar to the versions his sinkhole counterpart offers, the cards provide a different bonus while training Dungeoneering in Daemonheim instead. They are used by activating them while in a dungeon and have different effects depending on what card is used. You can have one solo card and one team card at a time. A new card of each type cannot be obtained until the previous one of that type is used or destroyed.
This article on an NPC has an associated dialogue page. Click here for a transcript of possible conversations with this NPC.
The hoardstalker is holding normal playing cards—6 of diamonds, 3 of hearts, 4 of spades.