Cockatrice

The Cockatrice sits in the toxic-mutation family, applying a solid x15 sale multiplier to whatever crop it touches. You can spot it instantly by the tell-tale green particles dripping below the plant, the same visual cue shared by the wider poison/toxic line, so it is easy to confirm at a glance before you harvest.

What makes the Cockatrice interesting is its source rather than its raw number. It is a divine pet introduced in the first half of the Fairy Event, hatched from an Enchanted Egg at roughly a 1% chance, which makes it a genuine grind to obtain. As a pet-driven mutation it pairs naturally with environmental and growth multipliers, so a Cockatrice-tagged crop that also carries weight, Rainbow, or a weather mutation can multiply into a very respectable payout.

At x15 it will not single-handedly carry a giant sale the way a triple-digit mutation does, but it is a dependable mid-tier boost. If you already opened Enchanted Eggs for the pet, treating its mutation as a steady value bump is the right mindset; chasing it purely for the multiplier is far less worthwhile than letting it stack on your best produce.