Epic Fighter 23nd Level

Superior Second Wind - Your Second Wind ability lets you regain hit points equal to 1d12 + your Constitution modifier + your fighter level. At 25th level this increases to 2d12 + your Constitution modifier + your fighter level.

Ability Score Improvement - When you reach 21st level, and again at 25th and 29th level, you can increase one ability score of your choice by 2, or you can increase two ability scores of your choice by 1. Contrary to earlier levels, you can now improve your ability scores up to 24 using this feature.

Agoge - Your rigorous and methodical training, has made you capable of shrugging off strenuous activity that would exhaust anybody else, as well as made you proficient with another skill. Choose one skill from Acrobatics, Animal Handling, Athletics, History, Insight, Intimidation, Perception, and Survival. In addition, when gaining one level of exhaustion, you can choose to not gain the exhaustion. Once you use this feature, you must finish a long rest before you can use it again.

Extra Attack - You can attack five times whenever you take the Attack action on your turn. At 28th level, the number of attacks increases to six.

(from Epic Characters manual by Quill and Cauldron)