Season 2 Master
Dragonflight Season 2 Master is a brand new achievement added in Patch 10.1 that will grant every character a Tier Omni-Token when they complete one of 3 achievements:
However, this achievement currently seemed to be bugged as players have reported that if you complete Dragonflight Keystone Master: Season Two first, you will not be awarded the Omni-Token. If you complete KSM and don’t get the Omin-Token, completing another achievement requirement still doesn’t give you a piece, making you down a Tier Piece that you expected.
Hopefully Blizzard can fix this soon.
For the time being, if you want the Omni-Token don’t complete Keystone Master until you complete Heroic: Aberrus or get Challenger II in PvP.
