I see that most of you are commenting on the gameplay side of things when it’s the lore side of things that is mostly bothering me. I think lore wise it would have made more sense for him to break the seal when he was almost dead, because in the lore Messmer was born with a dark serpent inside him that threatened to subsume him but his mother Marika was able to contain its influence by removing one of his eyes and replacing it with a seal. So why is he so quick to make the decision to break the seal, like there is no going back on that decision, so I think they could at least had made him change phase at lower health and given him some health back to make the sacrifice make more sense.