Rock Drop, Cave In, Demon Crush
Temple of the Ancients
Immune to Status
Sleep, Return, Confusion, Silence, Transform, Stop, Berserk, Paralysis, Stone, Slowly Stone, Manipulate, Death
This boss is harder than the last, so be on your guard. Heal often, and make sure your characters don't stay down for long if they faint. Definitely use Bahamut, and your other summons except for Shiva, Ifrit and Ramuh (they don't do so much damage). If you have Deathblow on Cloud, that works well too. Every once in a while, he does a major attack called Demons Rush that takes a lot of HP from the whole party.