Manaless

Manaless Champions are Champions in the League of Legends, which do not possess Mana. While the largest number of Champions use Mana, some Champions actually use their Health as Ability Cost. A minor number of Champions however use no Cost at all. They are fully played on Cooldown.

Cooldown Champions
Cooldown Champions use no form of Cast Cost. Their main advantage is their steady fighting ability and their independence from ability costs, allowing them to focus entirely on offensive or defensive stats. Their main disadvantage can be their overall lack of disables, such as slows and stuns.

Health Champions
Health Champions use their own health to cast their abilities. Their main advantage is the ability to focus on their Health Regeneration and Health totals, as they don't have to waste time regenerating Mana or Energy. However, they can literally fight themselves to death if their skills are used carelessly. Mordekaiser is slightly unique in this class, as he uses a gray "armor" bar instead of Mana that is recharged with his abilities and will absorb any type of damage (to an extent).

Energy Champions
Energy Champions use a special kind of Attribute to use Abilities. They use a yellow Energy Bar, which has 200 points total and cannot be increased beyond that. The main advantage of Energy is the relatively fast regeneration rate(50 Energy per 5 seconds). There are currently no Energy regeneration increasing items, which can be seen as a hard disadvantage, however certain skills will give instant regeneration of a portion of Energy. The Ancient Golem buff will increase the Energy regeneration by the same percentage as Mana. The neutral point of Energy Champions are the frequency of their abilities; they possess short Cooldowns and often complement each other, however Energy can be rapidly drained in this way. Energy was the most recently added skill source. It is possible, but not confirmed yet, that Akali will also be an Energy-based Champion. It can be speculated that, since she is of the same order as Shen and Kennen (both also Ninjas of the [Kinkou Order]), she will also utilize the same Energy type. So far, only Ninja type Champions have been seen using Energy.
 * Akali
 * Akali
 * Akali