This is a fairly simple one. I was using the Blood Crescent, and instead of doing 200 damage as advertised to enemies besides Undead and Corrupted, it was only doing 150. It was still doing proper normal damage, just the overpowered ultimate isn't as overpowered as advertised. The -30% to Undead and Corrupted is still working as advertised, doing 105 instead of 150; 45 less damage which is 30% of 150.