Risk of Rain 2 Blue Orb has already confused many players. Players first run into the Blue Orb when the message "a blue orb has appeared," pops up on the screen. You saw this message because someone in your team found a small blue rock. If you give a Lunar Coin, the blue orb will appear! 

Risk of Rain 2 Blue Orb: What Does the Blue Orb Do? 

The Blue Orb is a passive item for players once it appears, as it will open the Lunar Portal. Defeat the boss and a portal to the Bazaar Between Realms will appear. Jump in and you'll meet a trader who wants 10 Lunar Coins. If you pay the fee, you will unlock the Artificer character.

Risk of Rain 2 became available for early access on March 28 with new partner Gearbox Software, developers of the Borderlands series and the recently-announced Borderlands 3. It features similar gameplay to the original with expansion on the core gameplay of level-based procedural generation, character progression, item recovery and defeating monsters. A major addition was the shift from 2D to 3D.