It evolves from Flawk when exposed to a Fire Stone.
Legenix, having their nests close to the ground, are fast, but short-time fliers. When hunting, they hide behind rocks, then leap out to spit fire in a ring-like pattern, thus trapping its prey. It also spits fire on trees, then waits for tree dwelling prey to follow down. They are excellent runners.
Legenix nest near ground, as their young find it difficult to fly.
Legenix are said to be immortal. Once every 100 years, they will burst into flame and be reborn as a Flawk egg.