Mad Mack by Maximus Ultima

Level 1

[Trait/Active] Pedal to the Metal
Increases acceleration rate in Hellion Mode to 15% additional Movement Speed per second.
Activate to increase Hellion Mode's acceleration rate to 30% per second for 2 seconds.

[Trait] Top-Up
Collecting a Regeneration Globe increases Super Stimpack's cooldown rate by 60% for the duration of its effect.
? Quest: Collect Regeneration Globes to increase Mad Mack's Health Regeneration by 1, up to 20.
? Reward: After collecting 20 Regeneration Globes, collecting Regeneration Globes increases the next cast of Super Stimpack's heal by 12.5%, stacking up to 50%.

[Basic Attack] Thermite Filaments
Basic Attacks ignore Armor and deal 100% additional damage to non-Heroes.

[Passive] Fire Fighter
Each enemy Hero hit by Mad Mack's Basic Attacks reduces his Basic Ability cooldowns by 0.4 seconds.

Level 4

[Basic Attack] Twin-Linked Flamethrowers
Increases the radius and range of Hellbat Mode's Basic Attacks by 1.
Increases the width of Hellion Mode's Basic Attacks by 1.

[Q] Thickening Agent
Tar's duration is increased by 1 second, and its slow is increased to 40% but now decays over its duration.

[W] Running on Fumes
While in Hellbat Mode, making Basic Attacks during the last 2 seconds of Super Stimpack's duration refreshes the duration of its Movement Speed bonus to 2 seconds.

Level 7

[Q] Immolation Fluid
Basic Attacks against burning Tarred enemies increases its burn damage by 25%, up to 100%.

[W] Adrenal Surge
Super Stimpack grants Mad Mack 10 Armor for its duration. This Armor stacks with Hellbat Mode's Armor.

[E1] Burn Rubber
Nitrous Boost's movement speed bonus no longer decays.

[E2] Puddle Hopper
Increases the range of Jump Jet Charge by 50%.
Jump Jet Charge applies Tar to enemies it hits.

Level 13

[Q] Bring the Heat
Tar reduces enemy damage by 20%, increased to 40% if they are burning.

[E1] Road Rage
While Nitrous Boost is active, colliding with an enemy deals 120 damage, knocks them aside, and stuns them for 0.5 seconds. Heroes hit reduce its cooldown by 1 second.
A given unit can only be hit once per cast of Nitrous Boost.

[E2] Helljumper
Jump Jet Charge grants 10 Armor per enemy Hero hit, up to 50, for 2 seconds.
Hitting at least 2 enemy Heroes with Jump Jet Charge activates an untalented Super Stimpack for free.

Level 16

[Basic Attack] Face Meltor
Basic Attacks deal additional damage to Heroes equal to 1% of their Maximum Health.
Each subsequent Basic Attack within 3 seconds of the last deals 0.5% more of the target's maximum health in damage, stacking up to 2.5% total per Basic Attack.

[Q] Tar Bomba
Increases the radius and damage of Tar Bomb by 100%, but also increases its cooldown by 5 seconds.
Tar applied by Tar Bomb now ignites instantly.

[W] Getting Fired Up
Super Stimpack restores 20% of Mad Mack's Maximum Health instantly.
Super Stimpack's healing is increased by 50% while Mad Mack is below 50% health.

[E2] Bat Outta' Hell
Jump Jet Charge now has 2 charges with a 4 second cooldown between uses.
Hitting at least 2 enemy Heroes with Jump Jet Charge's impact damage restores 1 charge.
Jump Jet Charge's cooldown is increased to 16 seconds.

Level 20

[Basic Attack] Infernal Pre-Igniters
Increases Mad Mack's base Attack Speed to 1 per second.
Basic Attacks in Hellion Mode no longer have a delay after moving.

[Passive/Active] Brimstone Juggernaut
Mad Mack's base Movement Speed is increased by 10% and he gains the ability to push units out of his way.
Activate to become Unstoppable for 2 seconds.

[R1] Firestorm
Rain of Fire gains 3 more charges, but its cooldown is increased by 30 seconds.
Rain of Fire's cooldown is reduced by 5 seconds for every enemy Hero hit by its impact damage.

[R2] Flame On!
Infernal Blast's radius is increased by 20%, and Mad Mack now radiates fire for 3 seconds afterwards, dealing an additional 80 damage per second.
Enemies can only be Feared by the same cast of Infernal Blast once.