https://www.wowhead.com/news/myth-upgrade-track-is-retroactive-in-patch-10-1-5-upgrade-441-base-gear-to-447-333720

https://us.forums.blizzard.com/en/wow/t/dragonflight-fractures-in-time-ptr-development-notes/1587226

아래는 간단한 의역입니다.

ITEMS AND REWARDS 아이템과 보상

Gear created at item level 441 or 444 can now be upgraded using the new Myth upgrade track instead of being above the upgrade system entirely.
템렙441과 444로 생성된 아이템들은 이제 새로운 신화등급 업그레이드 트랙을 따라 업그레이드 됨.

The Myth track is a new track that goes from 441 (Myth 1/3) to 444 (Myth 2/3) to 447 (Myth 3/3). Gear cannot be upgraded above Myth 3/3.
신화트랙은 441렙이 (신화 1/3), 444렙이 (신화 2/3), 447렙이 (신화 3/3) 등급이며 447 을 초과하여 업그레이드 되지 않음.

This change is retroactive for all gear obtained in Season 2.
이 변화는 2시즌에 획득한 모든 아이템에 소급적용됨.

Any Season 2 gear that was created at item level 441, 444, or 447 will now display its upgrade level along the Myth track and can be upgraded at any item upgrade vendor.
어떤 시즌 2에 획득한 441,444,447 템이라도 이제 신화 등급 표기가 될 것이고 업그레이드가 가능해질것임.

Upgrading gear along the Myth track requires Flightstones and an Aspect’s Shadowflame Crest for each upgrade. The usual discount rules apply here (if the character has a higher level piece of gear in the same slot, no crest is needed; if any character on the account has a higher level piece of gear in the same slot the Flightstone cost will be halved).
신화트랙에서의 템 업글은 군단석과 위상징표가 필요함. 일반적인 할인룰은 여기서도 적용됨. (동일부위 고템렙 있을경우 위상불필요. 및 계정내 최고등급 이하업글시 군단석 50% 할인)