How the season works

1. Every six weeks a new season starts, and the track starts again at tier 0.
2. One tier for every 100 XP you earn from matches during the season. Spending XP never lowers your tier.
3. Claim each reward when you reach it: Shards, packs, and at the end the season's card back and animated avatar frame, only available that season. Free for everyone, nothing to buy.