I'm currently on chapter 18. Most of my characters are level 40-50. I can easily clear Leviathan descended and have done so 5 times with zero Leviathans. I've tried Leviathan Evolved and have 2 issues: 1 - I don't have any ice wielding units 2 - The cross attack one shots any of my units who happen to get caught in it I find the attacks easy to avoid but the amount of damage I do with the barrier up is so small I end up dying eventually anyway. Advice on best way to collect him? What is the drop rate in descended? How much better is it in Evolved? Are there any easily obtainable characters that have ice?