Info: First reset of Quests on Arena is live - You can do that one quickly before the full SOS reset later
If you've done all your quests yesterday, you should have a single new Quest.
You can do that until the full reset in a few hours.
A soon as you gain 3 quests and your Weekly Win Rewards resets, the SOS Reset is happening.
Don't do these quests until Mastery Pass is live, which is usually at about 9AM PST.
u/Backwardspellcaster — 9 hours ago