Blizzard has confirmed that once the World Bosses go live on July 18th, players will be able to purchase their Tier 0 Dungeon Sets with Tarnished Undermine Real. This is a great quality-of-life update for players who have been unlucky in their Dungeon runs.
World Bosses Azuregos & Lord Kazzak Guide — Season of Discovery
We’ve got you.
Tier-0 will become available from the Undermine currency vendor tomorrow when the raids open.