Mythic Boon of Combat Alacrity

Mythic Boon Feat (Prerequisite: Level 21+)

You gain the following benefits.

Ability Score Increase. Increase one ability score of either STR, DEC, CON by 1, to a maximum of 30.

Once per turn, when you take the Attack action, you may make one additional weapon attack as a bonus action.

You can use this feature a number of times equal to your proficiency bonus per long rest.