This addon provides rightclick menu that allows you to spend unit experience for upgrades. Costs can be changed during game creation, and by default are:
* 6 xp for 4 health
* 10 xp for 1 movement (for the next turn and all subsequent)
* 16 xp for 1 additional damage (for each weapon)
* 56 xp for 1 additional strikes (for each weapon)
You may locally change slider ranges without any out of sync problems.
XP Modification is continuation of XP Era from wesnoth 1.10, based on work by Dovolente, itota and Nosmos