The Empire drove lots of creatures/races extinct, and forced others (demons, devils) away from the plane.
Card Reference: [ u ] Celestial Purge
The Empire used to use Sustain magic a lot, but doesn’t so much anymore because it makes mutants.
- [ u ] Gloryspeaker
- [ r ] Remnant of the Old War
Necromancy all but wiped out.
Card Reference: [ u ] Tar Pits Bloodreader