[1.2.397] Demon Slayer (3)

For instance, if you had a bunch of +% damage bonuses from potential and used Boomerang Step on a monster, you could do 40k, 40k, 50k, 50k (50ks being Shadow Partner hits). Now, it can't go above those 40k hits.

Yes, it affects Mirror Imaging as well.

When/what patch was this?
(Also, it's only 50% of the attack, how would it do that?)