Spongini Quackini

Mythic is the third-highest rarity in Steal a Brainrot. These brainrots are the workhorses of any serious player's late-mid-game economy: rare enough to be valuable, common enough to actually farm.

Spongini Quackini delivers strong income at $13K/s/sec, comfortably outpacing the typical Legendary baseline and well-suited as a primary earner during your first three rebirths.

Spongini Quackini was originally designed by BRAZILIAN SPYDER and entered the official Steal a Brainrot roster after the meme spread across short-form video.

Mythic brainrots show up on the conveyor at roughly 1-2% chance with full base upgrades. The cost-effective way to acquire them is to buy two or three Legendary brainrots and feed them into a Mythic-output fuse recipe. Once you have one, slap a high-tier mutation on it (Diamond, Lava, or any event-tier modifier) and it becomes the income engine that funds the rest of your account.

Costing $4.4M on the conveyor when it does spawn, Spongini Quackini sits inside the standard cost-per-income window for the mythic tier; trade values track that ratio closely on community boards.

Stack a Diamond, Bloodlust, or Cyber mutation on top and the multiplier compounds the base figure dramatically — the Cyber 11x mutation in particular turns this brainrot into one of the few pieces capable of paying back any base-upgrade cost in under sixty seconds.

Slot Spongini Quackini into a four-creature Mythic-or-better lineup and pair it with active mutations — it'll out-earn most rebirth-3-and-below alternatives without requiring constant attention.