Talk:Main Quest: Agartha/@comment-33407807-20181018211339/@comment-37378120-20181112231412

First of all, Phenex doesn't have 2.4 million HP. His highest is 972k if you count Guts, during the 2nd battle with him. Only if you add up all of his possible HP from over all 3 battles with him does his HP get that high(it totals just over 2.5 million, notably less than Goetia)

His final battle has infinite guts, but it only lasts for 10 turns. So it isn't about your total damage, it is about surviving 10 turns and then killing him once.

If you read the text describing his fight you would notice that Zenith of The Rainbow Blade activates once per turn if you trigger his Guts that turn. Zenith reduces his max HP, by 50,000 if what I heard is correct. After 6 activations of Zenith, poor Phenex will have a max HP of 1. At that point, you just need to survive until his Guts ends, and you have won.

A team with high offense could fairly easily kill him enough to see that 1 HP, such as Jalter Berserker or Ibaraki + Merlin + Mashu.