User blog comment:ElleRose/Cris, the Mana Blade/@comment-24.190.81.23-20120608023211

Minimum shield generation should be higher for manaless abilities. For example, Katarina will nuke someone, potentially killing them, while the shield will give only 80 Magic Absorption. However, if A champion like Annie did the same thing, the shield would be increased by over 200. This seems unbalanced against Mana champions, who already have disadvantages in terms of sustain. Also, why is the passive only against Magic Damage? Is there any specific reason?