I just tested it on a small and a large in a daily. it adds mamath club but nothing els on both sizes. it is bugged on part 2 of it's effects. my thought is it cannot look for/read the champ's size. the -sp is applied as a result in the same way as it skips the part where it confums any size there for it finds no large and just continues. why it is a permant reduction idk but I know that that part is normal. might build it in to the champ appone being applied and is not a condition so relieve/clense will not help it.
I'm getting a bug wherein 'Swarm: Festering Corpse' isn't removed from Zombie Apocalypse units when their numbers drop below 5. It doesn't actually do anything but the icon still appears alongside their other abilities.