[Event] Otter's Surf Die

- Description: The Otters use these dice instead of water-wings to swim in the ocean. Nobody knows how it was created, but it's popular since they can even keep giants afloat. Right-click to receive Otter's Surf Die x1 that has 1-6 pips and will double your rewards when landing on wave spaces in Ancient Black Spirit's Adventure. ※ You can find your new die in Ancient Black Spirit's Adventure (Menu > Reward).

- Additional use requirements are not yet decoded; this is not a complete eligibility check.