"Ivern can not attack or be attacked by epic monsters"
Does this mean I can invade every time there's an Ivern Jungler on my team
Does this mean I can invade every time there's an Ivern Jungler on my team
No. his jungle immunity is his and his alone.
No, it means that counterjungling Ivern is a horrid idea if you have any AoE skills, because if you scratch one of his buddies, your 1v1 becomes a 4v1.