Sunny

Sunny is the celestial crafted slime, built around Atlantis, and at 1 in 11.8 billion it is one of the most demanding goals in the entire game. The Tier S payoff makes it a top-end body, but the Atlantis crafting chain is what makes Sunny a project rather than a pull, and that project framing is the reason most maxed accounts pursue it at all.

Pursue Sunny only if you are completing the high-end crafted set and have the resources the recipe demands, since otherwise non-crafted Tier S celestials like Ouchy or Monke deliver more direct combat impact for a comparable investment of time. The honest framing is that Sunny is for the lineage rather than the loadout, the final crafted milestone after Crafty, Thorn, SlimeSlimeSlime, Puffy and Astro have already landed.

By the time you finish Sunny, your account has effectively closed out the documented crafted-slime ladder. Until Sunny is in the collection, the Atlantis recipe is the deepest realistic crafting target. After Sunny lands, the only remaining endgame is the pure rarity climb at astral tiers, which leaves crafting behind entirely and chases the ceiling on raw rolls.