- Main article: Casting Resource
A manaless champion is one does not use nor benefit from 
mana or 
mana regeneration.
To date, there are 27 champions that do not use mana. Some manaless champions utilize an alternative resource for casting or empowering their abilities.
The following champions do not use mana:
Alternative gating mechanics[]
There are a number of alternative mechanics that gate the availability of or empower a champion's abilities. Each champion may expend or generate these resources uniquely through abilities.
Energy[]
- Main article: Energy
Energy is a resource designed to inhibit the casting of basic abilities of a few champions in place of 
mana. It is represented by a yellow bar instead of blue.
Energy has a maximum of 200 (except for 
Shen, with 400), and regenerates rapidly, at a rate of 10 energy per second. This means that energy champions are not at risk of depleting their resource over a long period of time, however the small capacity restricts the rapid usage of multiple spells.
Champions that use energy:
Ferocity[]
- For the 2016-2017 mastery tree, see Ferocity Mastery Tree (2016).
Ferocity is a resource specific to 
Rengar's 
Unseen Predator. Ferocity acts similarly to 
Fury.
Ferocity is generated by casting abilities, and grants access to 
Empowered versions of his abilities when full.
Fury[]
Fury is an umbrella term for many named resources that must be generated before being usable, compared to Mana or 
Energy that exist in some quantity beforehand. For most users, this resource is only required by a single ability or passive effect.
It represents momentum and encourages sustained aggression from users, often gating a power-spike or empowerment.
Fury generation varies between users, but is always generated in-combat (e.g. on-hit, ability casts or taking damage) and often decays when out of combat.
- Known as
Frenzy[]
Frenzy is a resource used exclusively by 
Briar that is only generated when she finds an enemy target for her Frenzy state (via 
Blood Frenzy or 
Certain Death) and represents the remaining duration of it. Frenzy is removed upon her state ending or otherwise being canceled.
Heat[]
Heat is a gating mechanic unique to 
Rumble's 
Junkyard Titan that is intended to limit up-time but, like Energy, does not have an indefinite down-time. Heat is not required to cast abilities and is instead generated on-ability-cast, with Overheating preventing users from performing certain actions for a set time.
Health[]
- Main article: Health
Some champions use 
Health as a resource to cast abilities. It is critical to note that champions can never kill themselves due to ability casting. This is because they will be left at 1 health if their current health is below the cost.
Abilities that cost health can be used even if the champion does not have enough health to pay for the cost. With the exceptions of 
Ivern's 
Friend of the Forest, which cannot be used if he does not have enough mana or health for the cost, and 
Soraka's 
Astral Infusion, which cannot be cast if she lacks the mana for the cost or if she is below 5% health.
While these champions can cast their abilities more freely than most, their disadvantage is that frequent ability usage will bring them closer to taking 
fatal damage.
Health costs ignore 
invulnerability as well as effects that prevent falling below a certain health value.
Champions who use their own health as a casting resource:
Mana champions that also use health as a casting resource:
- Ivern, using Friend of the Forest
- Olaf, using Reckless Swing
- Sion, while he's in Glory in Death
- Soraka, using Astral Infusion
Besides Ivern, each of these champions have at least one ability capable of restoring their health:
- Briar's Crimson Curse, Snack Attack, Chilling Scream, and Certain Death
- Dr. Mundo's Goes Where He Pleases, Infected Bonesaw, Heart Zapper, and Maximum Dosage
- Olaf's Berserker Rage and Reckless Swing
- Sion's Glory in Death
- Soraka's Starcall and Wish
- Vladimir's Transfusion and Hemoplague
- Zac's Cell Division
- Note
- Health costs will not be paid while under the threshold of Kindred's Lamb's Respite.
Other uses of the secondary bar[]
Shield[]
Shield
Mordekaiser's 
Indestructible uses a resource called Potential Shield to store damage dealt and taken. Mordekaiser can spend it to gain a 
shield or choose to 
heal for a portion of it.
Yasuo's Flow[]
Yasuo's 
Way of the Wanderer uses Flow to represent the current charge toward a shield. At maximum charge, Yasuo may gain a shield upon taking damage from a champion or monster.
Yone's Flow[]
Yone's 
Soul Unbound uses Flow to count down the ability's remaining duration in centiseconds. It is functionally different to Yasuo's Flow.
Champions with abilities without cost[]
The following champions have no costs (including 
health) related to their abilities:
Champions without a secondary bar[]
The following champions have no applicable resource bar: