User blog comment:ClariS/Nalis, the Scarlet Cardinal/@comment-5038450-20121129121216/@comment-4881935-20121129151057

that would be a complete require rework on the skill, but I assume, it would be something like:

Nalis dash to target location, shielding herself for 1.25 seconds, blocking the next enemy spell that hits her.

If Nalis blocks a spell, Nalis damages all nearby enemy champions and reduces their magic resistance for 5 seconds.