The biggest issue with Ivern
Ivern does not function well alone, and a lot of people like dicking around all over the map when playing. If you don't group and you don't have someone for Ivern to work with, Ivern is SHIT tier. If Ivern has some dudes and gals around him, he's a bit better.
He still needs buffs though, but even with buffs, you'll need teamwork to use this champ.
Side note: Rylai's makes Daisy's punches slow. Maybe RoA + Rylai's + Liandry's should be a thing on him?
