After your Hero being eliminated, you can purchase Revive Hero to revive him. Your Hero's XP and Levels will not be lost.
If you don't revive your hero over 7 days, you have to hire a new one. Part of Hero's XP and Levels will be transferred to the new Hero, that depends on the level of the Hero Temple.
If you don't revive your hero over 7 days, you have to hire a new one. Part of Hero's XP and Levels will be transferred to the new Hero, that depends on the level of the Hero Temple.