Arcana are special tokens that become available to players once they reach level seven. Once you affix Arcana to slots in your Arcana page you will be granted additional attributes that boost your character from the start of the game. Although Arcana has a limited influence in the late game it is important for securing an early lead.
There are three different categories of Arcana (red, blue, and purple) which is then divided into three levels with level 3 Arcana granting the most additional attributes in exchange for the steepest prices. Higher level Arcana as well as additional slots for your Arcana page are earned by increasing your player level.
Red Arcana
Red Arcana will directly increase your overall damage. Core red Arcana provide tiny individual boosts to your attack damage, ability power, attack speed, and critical strike chance, amongst other things.
Blue Arcana
Blue Arcana deals with defenses. Core blue arcana supply armour, magic resist, armour pierce, and magic pierce.
Purple Arcana
Purple Arcana combines both red and blue Arcana and is a hybrid of the two. Core purple arcana provide more HP, HP regeneration, as well as life steal and magical life steal.