nearly all precursor modules are like that.  I thought this was w.a.d. ...

EDIT

retested, only the Hull reinforcement is like that, sorry, I was confused.  They all have no mass though, but they are limited to 1 per ship, as is expected.

It breaks the power graph though. Put one per ship of the fleetwide bonuses and your ships are so sick you go beyond 'max' power and down to 0 immed. Cue puny AI declaring war thinking you're 'ripe for conquest' and wiping themselves out (even though you were going for an alliance victory with them )

well, there's a bug with "The Bane" that will be corrected in the next patch, but there may be other issues too.

But these things should come at a price.  I mean, they are über powerful, they don't use resources and they don't have mass.  Why would I not use them on my super tiny ships?  Why won't I use them on every single ship I build?

If it required a precursor relic starbase for each component, or some mass that make me choose between this and more weaponry... Well, it could be different.  Or maybe they could require basic resources, albeit more than one unit.  Say, 5 units of durantium for hull reinforcement (it needs to be tested for balance though).

You have to research ALL 3 assention techs for them to become available, beyond mortality is only one.  This actually makes little sense (imo), as once you have researched all three you are only a turn away for winning by construction the assention gate