Necrorantis must continuously devour light energy in order to maintain the vivid colors on its body. Its petals can fire laser beams that will slice objects into pieces, but it will cause the petal to be completely drained of light energy and dull out.
It requires a lot of effort to maintain Necrorantis's vivid coloring, but some collectors enjoy this work and treat it as their hobby. Light is apparently the source of its energy.