Gnar's abilities have no cost and are only limited by cooldowns. His secondary resource bar instead displays his Rage. Gnar starts the game in Mini Gnar form with 0 Rage.
When Mini Gnar deals damage to an enemy with basic attacks or Boomerang Throws, he will generate 2 / 3 / 5 Rage (reduced to 25% against minions, monsters and structures). After dealing or receiving damage Mini Gnar generates 4 / 7 / 11 Rage over 3 seconds. If Mini Gnar has not dealt or received damage in the last 13 seconds, his Rage will start to decay. Mini Gnar and Mega Gnar's active abilities share the same cooldown.
When Gnar reaches 100 Rage, he gains access to an alternate set of abilities. After either 5 seconds or upon casting an ability, Gnar will transform into Mega Gnar for 15 seconds while his Rage depletes. Once his Rage is exhausted, Gnar will revert back into Mini Gnar and be tired out for 15 seconds. Gnar cannot gain Rage while he is tired.
Gnar gains different bonuses based on his current form:
When returning to Mini Gnar, Gnar will only retain his current health percentage, not current health total. This is a conscious design change to prevent Gnar from simply triggering Rage Gene in order to heal himself over time.
COOLDOWN: 20 / 17.5 / 15 / 12.5 / 10
Mini Gnar - Active:Gnar throws his boomerang forward in a line, dealing physical damage and slowing all enemies hit for 2 seconds. Upon striking an enemy or reaching maximum range, the boomerang will slowly come to an end, travelling back towards Gnar in a fixed direction. Enemies beyond the first take only 50% damage and an enemy can only be damaged once.
The 45 - 60% cooldown reduction is calculated at the moment this ability is used, not when the boomerang is caught/boulder is picked up.
Because both abilities share the same cooldown, Mini-Gnar may pick up a boulder and Mega-Gnar may catch a boomerang.
The boomerang has a width of 60 on its way out, but increases to 75 on the return. The boulder has a width of 90 and flies faster than the boomerang.
Using Boomerang Throw during Hop will cause the boomerang to travel 1100 units from the destination where he used Hop. This causes the animation of the boomerang to glitch slightly in height.
Mini Gnar - Passive: Gnar's basic attacks and damaging abilities apply marks to enemy units, up a maximum of 3 marks. Upon applying the third mark, Gnar deals magic damage equal to a base amount plus a percentage of the target's maximum health (capped against monsters), and grants Gnar 30% + (15% × GNAR!'s rank) bonus movement speed that decays over 3 seconds.
Rather than Crunch, while at 100 Rage, Gnar gains the ability to cast Hop and Crunch. Hop and Crunch is fusion of the two abilities: capable of performing Hop's bounce but applying Crunch's area of effect around both areas. Enemies can only be damaged once.