There are four card rarities: Common, Rare, Epic and Legendary. You can determine a card’s rarity by examining the shape and color of the icon beneath the card. Below are the rarity icons and the number of crystals required to level up each rarity:
Spells of Genesis Cards Rarity
A level represents an advanced stage in a card’s development. The number of evolutions a card can undergo differs based on its rarity. Common cards can evolve three times, Rare cards four times, Epic cards five times and Legendary cards six times.