2* Hero
You recover 10% of Hero XP when using a hero to level another hero.
A 2* 1.1 is worth 468 XP
A 2* 3.40 is worth 2,497 XP
(2,497-468) x10= 20,290 XP to fully level a 2* Hero
Emblems
My Sigrunn 1*+20 will not let me level another hero with her. “Hero has talents!” Appears over a greyed out Sigrunn 1*+20 .