User blog comment:LightofDeath/CCC2 - Drunt, the Savage/@comment-24976450-20140529174413

"I'm pretty sure ult is functionally similar  Diplomatic Immunity . Both limit one enemy champion to damage them (except AoE abilities in the case of Drunt) but is different in the sense that Poppy limits all damage from the rest of the team, while Drunt prevents visibility from the rest of the team."

If that is the intended function then you need to clarify that in the description of the ult

Active: Drunt jumps to a target enemy, dealing flat physical damage and making only Drunt visible to the target champion for a duration. Drunt also cannot see other champions for the duration.

As it stands now based on ult desctiption be closer to Nocs ult in that i'd limit both drunts and the targets vision to just eachother but it has no indication on effects to any other champions.