Legend of Heroes: Trails to Azure - Part 14C: Ursula Road Extermination

If you had the ability to heal enemies, this monster would be the easy way to farm interrupts/cancels. You can still do it here with their passive healing, but it will take awhile. We have to find some Dromes that need exterminating and they are all too happy to cast. Lloyd and Elie can interrupt them, but due to the sheer number, they will get some spells off. Just continuously chip away at them and their numbers will start to drop.