In Galactic Ancestries there is an Entu feat called Techentu that allows Entu without a host body to permanently merge with a willing or destroyed creature that has the tech trait.
It is unclear to me whether or not this merging is meant to apply the benefits of merging would normally give the character. Or if merging with another creature... doesn't actually merge you at all but just gives you construct-y traits at the cost of never getting to use your heritage power?
If it isn't meant to actually merge and just "give powers with nothing actually happening with the host that isn't your host" then why bother having it involve a willing or destroyed creature, to the point that even mindless creatures get given sentience so that they can consent to it?
If it is meant to merge, then wouldn't you be unable to move if you performed this on a destroyed creature because tactical symbosis prevents your movement?
Or is it meant to merge but with none of the standard effects of merging, but the other creature is just deleted from existence?
It does seem pretty weirdly written for a feat. I don't see why they wrote it like that when "You've merged with some junk you've found somewhere off-screen and now you get [insert benefits here] at the cost of your tactical symbiosis" is much less ambiguous.
Although I noticed that the Entu only got four pages in the book as opposed to six, so I think it's possible they were rushed as a whole.
The other problem I see is how they don't explain your new stats...
If I merge with an Anacite Protector, do I have access to everything it has, PLUS my own abilities? What about a Robotic Elite War Machine?