How do you get eternal orbs?

Could you please elaborate on the process of acquiring eternal orbs in the context of your game or platform? Are there specific quests, challenges, or transactions that need to be completed to earn these orbs? Is there a specific in-game currency or resource that's required for the exchange, and if so, how can one accumulate it efficiently? I'm curious about the overall strategy and time investment required to acquire eternal orbs, as well as any potential limitations or restrictions that may apply.