I’ve been trying for almost a week now. I only need to beat him and I can then do the champion league!! My monsters are in this order:
Demihorus
Catobledus
Freezenix
Mammut
Gulper
Infernowrym
Yetiking
Thunderhoof
Hadeberus
Leobolt
Viridizaurus
Halozwei
Typhonwyrm
Moji
I have my best at the end and moji at the very end to heal, but I just cannot do it!! Any tips? I always get my freezenix to create a duplicate just for the fact that he has lethal poisoning.
A Sacrifice summoner so your Hadeberus can use throw then use Bloodcrave after one kill or two. Have a healer to keep him going. Have your starter at the end for last stand.
Have your starter at the back so you can use last stand
Thanks for your replies guys 
Which monster do you suggest I get for a healer, and which monsters have summon sacrifice?
Also, do you feel that there is a really high difficulty increase in frost island? I had a really hard time with that one and almost every battle since then.
Also if it matters I’m rank 15 and my cost is 94 I believe (I’m at work right now so I can’t check)