I will note Aegislash as a potential threat, but let's see some calcs:
252- SpA Aegislash-Blade Shadow Ball vs. 248 HP / 8 SpD Cofagrigus: 252-296 (78.9 - 92.7%) -- guaranteed 2HKO after Leftovers recovery
Assuming it is full SpA aegislash, which it probably wont be if it's running sacred sword...