Shadow Research
Gain faster research and proving ground speed when you do Shadow Chamber projects, roughly equal to the bonus of two scientists and an engineer each time you complete a project.
Proving Ground bonus stacks with the bonus provided from Engineers staffed in the Proving Grounds (this should work with mods that add additional staff slots unless they do something funky and manually reset proving ground speed at some point)
Consider this the "carrot" to more stick-y mods like Plot Gated Chosen: you get bonuses for XCOM’s other research projects if you do the plot researches, instead of it just delaying your research when you do a Shadow Project.
