I had a similar thought…
- Make “Terror Versions” for Superuniques and Act Bosses with different color palette and improved abilities (few examples):
- Terror Blood Raven: will now cast single-target Amplify Damage more often. In addition to Fire Arrow, will cast Cold Arrow and Exploding Arrow
- Terror Summoner: has 75% Magic Resistance and casts Shiver Armor
- Terror Diablo: increase damage of Cold Touch and casts Bone Prison more often