At 19th level, classes now satisfy the prerequisite to take one of the new Epic Boon feats in place of an Ability Score Improvement.
The available feats are detailed on p. 210-211 in PHB24 and are:
- Boon of Combat Prowess
- Boon of Dimensional Travel
- Boon of Energy Resistance
- Boon of Fate
- Boon of Fortitude
- Boon of Irresistible Offense
- Boon of Recovery
- Boon of Skill
- Boon of Speed
- Boon of Spell Recall
- Boon of the Night Spirit
- Boon of Truesight
Each of these increases an ability score by 1, up to a maximum of 30, and bestows an additional permanent benefit that significantly affects the character’s performance in some aspect of the game.