Here is the full list of all 25 Royal Heroes achievements.
Find and restore a famous weapon. Get Warping Power increase.
Find and 'pet' at least 10 sheep
Discover all air spells
Discover all void spells
Discover all earth spells
Find and kill all of famous vampires
Discover all fire spells
Sacrifice a weak one to make your army stronger
Discover all water spells
Hire a 4 star hero
Do something useful. DOIT!
You can't be a winner all the time
Flawless victory - no casualties
Dont be a Batman - do it!
Warp a few times
Veni Vidi Vici!
Clear a whole other dimension. Get Warping Power increase.
Collect the whole set
Craft a weapon that only the worthy can wield
Come to dark side. We have cookies. And extra spell slot.