How to Play Dragon Spark

About Dragon Spark, from BoardGameGeek:

You are a hero with a specific class, ability, and skills. You will begin your adventure on 1 of 3 Dragon Hunts. Each Hunt consists of 5 waves of monsters. However, the player must decide on when it's best to fight the Dragon: Early into the Hunt but less prepared - or - Later into the Hunt in which the Monsters are more difficult but your Hero will be much stronger against the Dragon. During each wave, you will spend your energy to play your skills, add modifiers from collected loot, and spend gems to and charge your skills for the more powerful effects. Each skill will help defend, heal, attack monsters, and much more making each play-through unique. After each wave you will learn new skills, possibly forget old ones, and prepare yourself for the next wave or one of the three Dragons. Defeat all three Dragons and win the game.