Skills

All Heroes, Titans, and Pets use skills while in battle. After summoning Heroes and Pets have access to the first/white skill, by promoting further skills will be unlocked. Titans can use all their skills from the get-go. The number of skills varies, Heroes can unlock up to four skills, Pets three, Titans one and Super Titans two. But the behavior is always the same.

Active Skills
The white skill always has an active component that needs to be charged with Energy and can only be activated if the Energy Ear is full, hence it is sometimes referred to as the ultimate skill. Other active skills will be used automatically in battle and have a skill timeout that determines the time in between each usage, in some rare cases, some active skills have an initial timeout, usually smaller than the skill timeout, for the first activation of that skill.

Passive Skills
Passive skills are always active during the battle even if the hero dies, though that is only useful if the skill affects allies or enemies, except if it is specially mentioned in the skill description that the skill stops working after death, e.g. Cornelius's Memory Loss. Examples of passive skills that work after death are:


 * Dorian's Initiation - Increases Vampirism of nearby allies
 * Thea's Second Wind - Increases the speed of skills for each ally when the ally's health drops below 30%
 * Mojo's Hex - Curses a random target at the start of combat

Skill Requirements
Heroes and Pets need to reach the matching Promotion rank to unlock new skills and Titans have them unlocked from the start, as this listing shows:


 * Heroes
 * White Skill - Unlocked after summoning
 * Green Skill - Unlocked with Promotion Rank Green
 * Blue Skill - Unlocked with Promotion Rank Blue
 * Violet Skill - Unlocked with Promotion Rank Violet


 * Titans
 * White Skill - Unlocked after summoning


 * Super Titans
 * White Skill - Unlocked after summoning
 * Green Skill - Unlocked after summoning


 * Pets
 * White Skill - Unlocked after summoning
 * Green Skill - Unlocked with Promotion Rank Green
 * Violet Skill - Unlocked with Promotion Rank Violet

Skill Level
The difference between Hero and Titan or Pet skills is that the first ones get stronger depending on the skill level, but need Gold to level up, the cost per level cost can be found on this page.

For Titans and Pets most skills scale with the strength of its owner because they are either based on percentage values of the corresponding Stat, e.g. Moloch's Crushing Blow always deals 250% damage of his Physical Attack, or scale with the level, e.g. Mara's Mind Control always succeeds for targets of her level or below.

Note: The skill level of Pets is equal to the pet level (only relevant for skills like the aforementioned skill from Mara).

Skill Proc Chance
Several debuff skills state that the chance to apply the effect is lowered if the target's level is higher than the given level in the skill description. The formula to determine the success is: $$\frac{4}{4 + \text{Opponent's level} - \text{Skill level}} * 100%$$

If the Opponent's level is less than or equal to the Skill level then the chance is 100% or higher otherwise: