Raiju

The Raiju is a Divine pet sold through the Tranquil Treasures Shop, and its difficulty is unusual: it is not gated by an egg hatch at all, but by stock availability. The listing has only about a 0.83% chance to appear in stock each hour, which means you can have the currency ready and still wait through dozens of refreshes before it ever shows up. That makes patience and constant shop-checking the real cost of ownership, more so than the price tag itself.

For a farming build the Raiju is a strong Divine-tier addition. Pets at this rarity typically deliver a meaningful passive multiplier or utility effect, and slotting one alongside other Divines is exactly how serious players push harvest income into the high tiers. It is not a niche flavor pick; it is a roster piece you can commit to.

Whether it earns a slot comes down to your shop luck. If you manage to catch it in stock and afford it, the Raiju is well worth fielding on a competitive team. Until then, its sheer rarity in rotation keeps demand and trade value high.