Create power types which can be used for:

• Making certain mobs scared of you (like scare_creepers does with creepers)
• Making hostile mobs ignore you unless you attack them
• Making passive mobs attack you

seeing as origins are data driven, maybe something using teams could do the job for turning hostile mobs into passives, but i don't know how to do it the other way around or how to add neutral mobs to the equation

Would making passive mobs attack you be a good idea? I feel like you'd have to re-write most of their ai (including adding an attack animation) as they don't attack anything normally. Or perhaps were you thinking of neutral mobs?

Good! It makes races more real... It would be too sad for the enderian could be attacked by enderman...