The second option for a cheap source of life force is a carnivorous plant called the Green Face plant. This carnivorous plant eats any living thing, including other plants and blood.
The green face plant is a large plant that resembles a sunflower plant. But instead of a yellow head, its head is green. Its head can also open up to reveal many teeth capable of tearing meat and a jaw strong enough to crush bones.
This carnivorous plant has a clear advantage over the blood vine because its feeding range is wide, and it is not picky with its food. But it also has a major disadvantage, being that its conversion rate of food to life force is poorer than the conversion rate of the Blood vine.
Pink Ivy said that the blood vine has a conversion rate of 95% while the Green Face carnivorous plant has a conversion rate of 60%. So he will receive less life force from the carnivorous plant for each unit of food compared to the output of the blood vine.
