Cenarius by DoctorFoxman

Revitalize (Q): Quest: Heal allied Heroes with Wild Growth.
Reward: After healing 30 Heroes, reduce its Mana cost by 20.
Reward: After healing 90 Heroes, Wild Growth heals up to 5 nearby allies.

Bramble Aura (W): Quest: Hit enemy Heroes with Thorns 100 times.
Reward: Increase Thorns' duration by 50% and cause it to deal 40 (+4%) damage to nearby enemies per second.

Nature's Wrath (Active): Quest: Heal allied Heroes with Treants.
Reward: After healing Heroes 100 times, increase Treant's damage by 50% and healing to 4% of the target's maximum Health.
Reward: After healing Heroes 200 times, unlock the Nature's Wrath Ability, which can be activated to summon 3 Treants around you. 60 second cooldown.

Harsh Winds (E): Increases Cyclone's damage by 33%.

Ancient Lands (D): Treants grant 50 Armor against Minions and Mercenaries to nearby Minions.

Green Lord's Touch (Passive): Every 10 seconds, your next Basic Attack heals nearby allies for 100% of the damage dealt. Basic Attacks reduce this cooldown by 1 second.

Rampant Growth (Q): Wild Growth removes roots and slows from targets.

Walk with the Wilds (W): Thorns grants 15% bonus Movement Speed for its duration.

Nature's Safeguard (Z): Being stunned or rooted reduces Keeper of the Grove's cooldown by 20 seconds.

Early Spring (Q): Increases Wild Growth's initial heal by 150%, but reduce its healing over time by 50%.

Encroaching Vines (W): Enemies hit by Thorns are slowed by 30% for 1.5 seconds.

Mana Gusts (E): Cyclone emits a wave of Mana when cast, granting nearby Allies 20 Mana and reducing the cooldown on their Basic Abilities by 1 second. Additional waves are produced when enemies run into the Cyclone.

Nature's Gift (W): Thorns heals its target for 50% of the damage it deals.

Travel Form (Z): Increase the Movement Speed bonus of Keeper of the Grove by 5%. Its active component lasts 1 second longer.

Barkskin (D): Treants provide nearby allied Heroes with 20 Armor.

Nordr***il's Memory (R): Tree of Life grants an additional 20 Armor, lasts 5 additional seconds, and Basic Abilities gain unlimited range during its duration. Wild Growth will only heal allied Heroes outside its normal radius.

Ursol's Vortex (R): Increase Vortex's radius by 35%, which shrinks to half size over 4 seconds, and enemies will be knocked back the first 2 times that they try to exit.

Abundance (Q): Wild Growth's healing over time can stack twice and reduce its cooldown by 1.25 second per allied Hero healed.

Overgrowth (Active): Activate to heal an allied Hero for 50% of their missing Health over 10 seconds. The cooldown is reduced by .5 seconds per percent of Health the target was missing. Does not stack. 100 second cooldown.