The current invisible basi we have implemented on GrangerLab and Unitremia is a lot like this proposal, with some differences. The basi can charge for invisibility by holding down the secondary attack button (in the same way you would charge for a pounce, or trample, or luci, etc). While charging the basi is visible. The basic basi becomes visible if it moves, the adv basi can remain invisible while moving. If the basi is damaged, it becomes momentarily visible, also while it attacks it becomes visible. The basi can’t be seen on human radar while it is invisible, and turrets don’t detect the basi while it is invisible (but teslas, rc zap, and medistations can still attack it).
I am very much liking how this basi is playing out so far from both the alien and human perspectives in regards to game play, but we will still probably adjust various aspects moving forward.
More information about these new developments of the basi is discussed here: