Attributes

How stats are calculated:

There are many different stats that each player has, as well as a multitude of buffs, debuffs, and skills that modify them actively and passively.

A player's basic attack, left clicking on an enemy, deals their weapon's damage, be it physical, fire, or water.

A player has 5 basic attributes:

Strength,
Agility,
Fortitude,
Intelligence,
Luck.

Each player starts with all of these at rank E. A player gets X points per level, which they can distribute as they see fit. However, these points do nothing until they invest enough to rank up an attribute (E -> D), which causes the first bonuses to start. Certain classes start with higher base ranks than others. A single character can reach SBEEE, AABBE, ABBBB over their 30 levels.

The bonuses are as follows:

Strength:
E: No Bonus
D: Basic attacks deal 10% more damage. 9 more inventory slots. (Total 36)
C: All physical damage increased by 15%
B: Dealing physical damage has a 5% chance to stun the target for 0.5 seconds. This cannot occur more than once every 10 seconds.
A: Basic attacks heal the player for 5% of the damage dealt. Always active.
S: Grants 20% passive armor penetration.

Agility:
E: No Bonus
D: Movement speed increased by 5%.
C: Weapon damage increased by 10%.
B: Skill animations are 20% faster. Instant-cast animations can be done while moving.
A: Enemy skills have a 50% chance to miss if the player is below 30% HP. A successful dodge deactivates this for 10 seconds.
S: Killing an enemy player grants Tactical Stealth for 5 seconds.

Fortitude:
E: No Bonus
D: Maximum health increased by 5%. Counts as Bonus Health.
C: Damage taken from basic attacks reduced by 10%.
B: Armor and Magic Resist increase by a flat 20 each.
A: All Health Regeneration effects are 20% stronger.
S: Fatal damage instead silences the enemy player for 1 second. Cannot occur more than once per minute.

Intelligence:
E: No Bonus
D: Skill damage increased by 5%.
C: Skills cost 10% less mana.
B: Skills with a casting time are 33% faster.
A: Spending mana heals the player for 25% of the mana spent.
S: Killing a player resets all skill cooldowns. Does not affect skills with cooldowns over 30 seconds.

Luck:
E: No Bonus
D: Being hit by a player's basic attack grants 20 movespeed for 3 seconds.
C: Being hit by a player's basic attack grants 20% bonus dodge until a dodge occurs. Does not occur for 10 seconds thereafter.
B: Critical damage increased by 15%.
A: Dodging or landing a critical blow increases movement speed by 20% for 4 seconds.
S: Landing a critical strike grants 100% dodge until a dodge occurs. OR Dodging grants 100% critical strike until a critical occurs. Does not occur more than once every 15 seconds.