Champions and enemies alike have affinity and each have its own strength and weakness versus the other affinity. The four affinity are as follows:
Magic (Blue): Has an advantage over Spirit (Green), Is dis-advantaged against Force (Red);
Spirit (Green): Has an advantage over Force (Red), Is dis-advantaged against Magic (Blue);
Force (Red): Has an advantage over Magic (Blue), Is dis-advantaged against Spirit (Green);
bottomline Void (Purple): No inherent Advantages or Disadvantages
When attacking the same affinity type (magic vs magic) there are no buffs / debuffs unlike when attacking different affinity (magic vs spirit) which the magic gets an advantage over spirit.
Advantages[]
+15% Critical rate
+30% Strong hit chance
+30% Damage when a strong hit occurs.
Dis-Advantages[]
-20% Damage
+35% Weak hit chance
A chance of a Skill landing as a Critical Hit is reduced by 15%
When a weak hit occurs -30% Damage, debuffs cannot be applied