OP, just letting you know that I locked your other thread for this idea. Given that the threads were created an hour apart, it seems like you double-posted when the first one didn't get any replies. Please don't do that—it's spammy and unfair to other people who keep one thread per idea, as they should.
Anyway, I'll repost my stuff from the other thread:
Why does it need the poison immunity? Why does it need the plant healing ability? Heck, why does it need the force field ability?
Try to think up a narrative first before throwing together the abilities. For example, all of SCP-1338's abilities are written to facilitate the storyline, even down to the kid's appearance:
- Healing powers: because he's trying to help his dad recover
- Tree-climbing/vanishing abilities: Because he's a tree!
- Human speech: Indication he's a dryad, or similar mythological figure
- Different-colored eyes: because he's the son of two different kinds of trees (deciduous and evergreen)
Basically, your story should be something that ties the abilities together, and makes them make sense in relation to each other. The readers should think that it feels natural for the tortoise to be able to do whatever it does.