) and thought we could start off with a pivot. Cobalion brings Rocks and has a way to bring Hydreigon in safely with Volt Switch for it to proceed and wallbreak. Cobalion is also a huge magnet to stuff like Amoong, RH Tang, Skarmory and Aegislash ; which can all serve as Hydreigon food. Anything over Stone Edge can work but I feel Iron Head is pathetically weak rn. Thunder Wave and Toxic are options I like, the former crippling offensive switch ins like Mence, the latter putting some walls (including the ever painful volt absorbers) on a timer. Edge hits stuff like Thund and Moltres for good damage, which I value these days.