The Battle Pass allows you to fight  battles, advance through the nodes and reach milestones as you collect juicy rewards.

Rewards include:
  • New Obsidian Relics
  • Tier 7 Multiplayer Chests
  • Tier 6 Multiplayer Chests
  • Level 10 Runes
  • Diamond Relic Chests
  • Multiplayer Monster Egg (different each Season)
More details are available here