How do you raise a dragon's Reign Level in Dragonfire?

A dragon's Reign Level goes up two ways:

1. By fighting: XP comes from enemy troops killed. The more you send that dragon at beasts, knights and players, the more levels it gains.
2. By feeding it Meat: Meat raises the level instantly (an alternative to combat XP). You get it from events, the campaign, encounters and the shop.

Level drives the dragon's maximum army size and its 4 stats, and it carries a big share of its Power 🔥.

⚠️ Careful: Reign Level resets every reign — you re-grind it every season. The Combat Training research gives +2.5%/level of dragon XP in PvE to speed that up.