Drunt's autoattacks will knock enemies back 25 units, but do not interrupt channels, autoattacks and the like.
COOLDOWN: 18 / 17 / 16 / 15 / 14
Active: After a 1 second delay, Drunt goes invisible for up to 8 seconds, but can be seen by enemies 400 units near him. His next autoattack will have 200 extra range (325 total), knock the enemy back 400 units and deal bonus physical damage.
Active: Drunt jumps to a target enemy, dealing flat physical damage and making only Drunt visible to, and can be only harmed by, the target champion for a duration. Drunt also cannot see other champions for the duration.
Only the target champion can damage Drunt. AoE abilities by other champions cannot damage Drunt throughout the duration.
Vision wards cannot reveal Drunt to other champions.
v1.1 - Edited ult to better fit the contest rules
v1.0 - Released champion to LoL Wikia
Lemme know what needs changed and/or fixing.
I'm pretty sure ult is functionally similar Diplomatic Immunity. Both limit one enemy champion to damage them, 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.