Only three upgrades are available in the game and these upgrades are not permanent and need to be reapplied regularly:
Spell Upgrade - Gives a 40% increase to your spell damage.
Hero Upgrade - Makes your hero 60% stronger and more resilient.
Troop Upgrade - Gives you a 30% boost to your morale bar, allowing you to call in reinforcements more rapidly.
Royal Revolt! Upgrades List
The stars just haven't aligned.
Get to know the man behind the fame.