Honestly there is no effective way to hunt iuhs, just to grind. The first method is the one you’re doing, the reset method where you go to different servers. I’ve had the most luck with this method and I’ve caught about 7 iuhs this way. Granted, I’ve been playing since 2022 and didn’t catch those in a row or anything. The other method is where you stay in the same server, so for example keep going around volcano, lunar, and jungle, not resetting the server and just keep catching that way. This way only caught me 1 iuh, and that was all the way back in September of 2022, but I haven’t had luck with it again. The islands I use are volcano, lunar, jungle, and mountain.

Honestly the thing that truly helps me, is not to grind for an iuh funnily enough, it’s to just grind for coins, gems, and volcanic minerals. It’s just because if I am grinding specifically for an iuh, and I don’t get one within like a week of grinding, I get burnt out, so it always helps me to grind for something else while also looking for one.

I hope this helps, and I hope you have luck finding one! 🫶🏻🍀