With today's weekly reset the second charge of Renascent Dream for the Revival Catalyst in Season 3 is now available, allowing players to convert non-tier gear into an equivalent item level slot Tier piece.
Revival Catalyst Guide for Crafting Tier Sets
Simply drag your item to the slot in the interface, or select your item by clicking the slot and selecting from the eligible options. Crafted gear is not eligible to be turned into tier. Click Transform. Confirm. Profit.
The Revival Catalyst is located in Tyrhold, at /way 59.73, 53.74. Antuka, a Refti who serves as the Catalyst Steward stands beside the console.
Revival Catalyst Location
If you're looking to learn more info about your class and spec's tier set, be sure to check out class guides for a complete overview of the Season 3 Tier Sets including bonus descriptions, relative strength, and recommendations on when you should break your Season 2 set bonus in favor of the Season 3 bonus.