Raiju

The Raiju mutation applies a x8 sell multiplier, a solid mid-tier value boost that you can identify instantly because affected produce emits yellow electricity particles. That crackling visual is your confirmation the bonus landed, and it fits the Raiju's thunder-beast theme cleanly.

The catch is access. The Raiju is a Divine source sold through the Tranquil Treasures Shop, but it had only around a 0.83% chance to appear in stock each hour. That is brutally low: across a full day of refreshes you are still far from guaranteed a single appearance, so securing this effect is a patience-and-luck grind built on watching shop rotations rather than triggering a weather event.

For value stacking, x8 is a clean multiplicative layer that plays well with rarity tiers and weather mutations, so an electrified crop that also picks up a stronger weather multiplier compounds nicely instead of capping out. Is it worth chasing? If you can catch the rare restock, yes, the x8 pays off on high-base crops, but do not build your economy around it given the sub-1% hourly odds. Treat it as opportunistic upside, not a reliable engine.