Devouring Ones by KingWut117

Hitting an enemy hero grants the Devouring One a single stack of Adrenaline, up to 15 stacks. After 5 seconds, stacks begin to decay at a rate of 1 stack per second. Landing an attack refreshes this duration.

The Devouring One gains 1% attack speed per stack of Adrenaline.

Cooldown: 15 seconds
Both Devouring Ones gain 25% movement speed for 5 seconds. Basic attacks made during this time also cause the Devouring One to leap at the enemy from a max distance of 1.

(Devouring Ones sprout wings for the duration and take bounding leaps)

Cooldown: 10 seconds
The Devouring One closest to the targeted enemy (range 3) latches on to that enemy for 3 seconds. During that time, the enemy takes 80 (+4.0%) spell damage per .5 seconds and the Devouring One remains latched to that enemy. Each time an enemy takes this damage, its speed is reduced by 5% (this penalty lasts for 1 second after latch ends) and the Devouring One gains 1 stack of Adrenaline.
While latched, a Devouring One is not targetable, but can still be affected by AoE and skillshots. Hard CC (Stun, Silence) ends a latch early, but roots or the target becoming unstoppable does not. If the target is time stopped or put in stasis, the latch ends early.

Only one Devouring One can cling to a single target at a time.

Cooldown: 3 seconds
The selected Devouring Ones burrow into the ground after a 2 second channel. Roots interrupt this channel.
While burrowed, the Devouring One is invisible, cannot move, has double health regen, and takes 50% less damage from all sources. Taking damage while burrowed reveals the Devouring One. Reactivating Burrow while burrowed will instantly unburrow the Devouring One.

Activating Metabolic Boost while burrowed allows the next Attack command for the duration to immediately unburrow the Devouring One, leaping at the target as normal if it is in range.

[1]
Selects the first Devouring One

[2]
Selects the second Devouring One

[3]
Selects both Devouring Ones

Cooldown: 90 seconds
Each Devouring One is wrapped in a cocoon for 2 seconds, gaining 25 armor and unstoppable for the duration. They then hatch into 3 swarmlings each. Hotkeys 1 and 2 select a group of 3 swarmlings respective to the previous devouring one. The Devouring Ones abilities change while in Swarmling Form. Swarmling attack damage is reduced to 40 (+4.0%)
(Q) Metabolic Boost: Applies the same benefits, but the duration is reduced to 3 seconds and the cooldown to 5 seconds.
(W) Cling: Reduce the cooldown to .5 seconds, reduce the spell damage to 40 (+4.0%) per .5 seconds, reduce the movement speed penalty to 2%. A single target can have up to 3 swarmlings at once.
(E) Evasion: [CD: 3 seconds] Swarmlings lose the burrow ability, and instead will leap a short distance away from the central point of all selected swarmlings. (similar to Chen's old Storm, Earth, and Fire ultimate)
(D) Adrenaline Rush: Swarmlings have the same amount of stacks as their parent Devouring One, and continue to gain stacks as normal.

After 15 seconds, the remaining swarmlings move towards the closest central point between them and reform into cocoons, respawning the Devouring Ones based on the number of Swarmlings still living.
1: 15% HP
2: 25% HP
3: 45% HP
4: 65% HP
5: 85% HP
6: 100% HP

Cooldown: 90 seconds
The Devouring Ones enter Baneling Cocoons for 5 seconds (every 5 stacks of Adrenaline reduce this duration by 1.25 seconds), and emerge as banelings. Banelings have the same statistics as Devouring Ones except some of their abilities change and they lose 10 armor. A Baneling's basic attack deals 500 (+4.0%) damage in a small radius and kills the Devouring One. Dying in this way does not grant experience to the enemy, and reduces the death timer for the Devouring One to 10 seconds.
(Q) Launch: [CD: 5 seconds] The Baneling launches itself a short distance (range 3) and detonates if it comes into contact with an enemy.
(W) Detonate: Can only be used while burrowed, will detonate the baneling.
(E) Burrow: Works as normal. If Tunneling Claws is picked, moving generates more obvious green acid effects on the ground around a tunneling baneling.

If a baneling is killed before it detonates itself, it deals half of its normal damage, grants XP, and has a full death timer as normal.

Devouring Ones cannot use a mount, and instead have a base speed of 115%.