If you want to know exactly what creature I'm referring to, look at Feasibility of Carnivorous Flower-worm. Let's say I want people to be able to ritualistically implant these creatures to gain the benefits of increased energy (from their photosynthesis) and a monster alarm system (from their creature-sensing ability).

This requires a few abilities:

  1. Ability to connect to nervous system/release chemical signals into the host for communication

  2. Be able to share nutrients with the host

  3. Be able to extend "roots" that it can regenerate from if it's cut off

  4. Be able to sense and differentiate from organisms around it

How can this be made possible?

Please Note: I'm not asking you to explain how this creature can be implanted into a human being, but rather I'm asking you to explain how the four abilities above could work. In other words, I'm asking for adaptations that would allow it to function as an implant, not an explanation of how it could be implanted.

As for why: As an interesting feature I pictured a race of extremely nature-attuned people (Forestkin, they see themselves as an extension of the forest, one with nature) cutting themselves and then implanting an Anklebiter (AKA flower-worm) in their wounds. The Anklebiter would allow the Forestkin to gain energy from the sun and sense nearby living things, making hunting and evading monsters much easier. I picture these Anklebiters being implanted behind the ears, as these worms do look like flowers after implanting.

What, Exactly, Am I Asking?

  1. I'm asking for explanations for the abilities above. Magic is involved, but not much, so all I really need is a biological basis for each ability.
  • $\begingroup$ Why does this creature need to be a plant? An animal with parasitic features would be more viable in this role. Maybe a yeast that controls its host thru secreting psychoactive chemicals -- but the behavior thus induced would be very limited. $\endgroup$
    – llywrch
    Dec 11 '20 at 21:38
  • $\begingroup$ There's nothing saying it can't be evolved from protists, which have plant and animal traits. $\endgroup$
    – Alendyias
    Dec 11 '20 at 21:39
  • $\begingroup$ "Protist" is a blanket term for all forms of life not plant, animal or fungus, & more often than not unicellular. (I checked Wikipedia before writing my note.) $\endgroup$
    – llywrch
    Dec 11 '20 at 21:44
  • $\begingroup$ Yes, I know they're usually unicellular. In fact, before your comment I assumed all of them were unicellular. However, some protists combine plant and animal traits, and single-celled organisms DID evolve into multicellular forms, right? $\endgroup$
    – Alendyias
    Dec 11 '20 at 21:47
  • $\begingroup$ I see a trend developing here. I assume you're not asking us to explain how your fictional and fantastic creature can be biologically "implanted" or attached to a human being? That would require you explaining (in massive detail) the biology of your creature. Can you better explain what problem you're trying to solve? Please start with explaining why you need this question answered. Thanks! $\endgroup$ Dec 12 '20 at 7:06

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