When you are digging in Bikanel you will notice that Picket alerts you that an unidentified object is approaching this object is a fiend known as the Angra Mainyu the Cacti-nemesis. He is solid and although he dosen't inflict much in terms of damage his health and Def. are way above normal. With a staggering 333444Hp he is no smalll fry, that is nearly the same as the Ruby and Emerald weapons off FF7. All you need to do is equip one or more of you characters with cat-nip and use Trigger-happy (Lv3 a must) or one of the mixed ingredients you get from the Samurai sphere it's a bit like sunburst but better. Keep using this tactic until it finally topples, but watch out for it's Unatural Selection ability which immediately ejects you from the battle. The rewards are great the exp. is through the roof and the Ap. is about 20-30 so happy battling.