Urvan Vessel is a relic found in Lara Croft: Relic Run. This relic is the 19th relic in Desert Ruins. 36 clues must be found on the 78th level to obtain it. Once obtained, the player is rewarded with 1950 coins.
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Carter seems to have left the region now, heading to somewhere in the Himalayas, I think. I'll need to get after him.