Something to note for us PvPers:
No other PvP items are upgradable, and no new PvP items for the foreseeable future will use the upgrade system.
It shouldn’t be too surprising, given that we’ve already come out and said it some weeks ago, that item upgrades are essentially not coming back for PvP. It’s something a lot of PvPers asked that we remove, it’s something we didn’t feel worked out too well, and so unsurprisingly the result is that it isn’t coming back. We’re still probably going to allow the Season 12 items that had previous upgradability to remain upgradable, as noted in the bullets above, but it’s not something we’re absolutely certain about at this moment. We’ll let you know if that changes.
Basically saying sorry but PvP item upgrading was the worst thing and something we'll never get again :)