The Headless Horseman [Basic Concept] by LiteralWho

Upon death, The Horseman's Head flies off in a random direction. The Head moves at 50% speed and has 33% of your maximum health. The Horseman's Body will automatically attempt to move towards the Head.

If you successfully rejoin with your body, you are brought back to life at 66% Health and this trait is disabled for 180 seconds.

"Here's my body, fit and pure! Now, your blackened souls I'll cure!"

Cooldown: 12 seconds

Disorient the target for [Duration], dealing [Damage] to the target and nearby allies for the duration of the effect. The effect is removed early if the target takes more than 20% of their health as damage from other sources.

"Harken, cur! Tis you I spurn! Now feel... the burn!"

Cooldown: 6 seconds

Cleave enemies in a cone in front of you, dealing [Damage] and stealing 10% of their movement speed and increasing yours by the same amount for [Duration] up to a total of 50% increased movement speed.

"Your body lies beaten, battered and broken. Let my curse be your own, fate has spoken."

Passive

Your basic attacks and Fiery Cleave burn the target, dealing [Damage] for the [Duration] and stacking up to 3 times.

"The sky is dark. The fire burns. You strive in vain as Fate's wheel turns."

Throws 3 Pulsing Pumpkins at the target area, which last for [Duration] and can only be killed by 3 basic attacks from Heroes or Structures. The Pulsing Pumpkins continuously spawn pumpkin fiends which attack nearby enemies and inflict Searing Blade with their basic attacks. 

"Soldiers arise, stand and fight! Bring victory at last to this fallen knight!"

Summon your steed and fly into the air, becoming untargetable and ignoring collision for [Duration]. While flying, you are unable to use abilities but you leave a trail of fire underneath you dealing [Damage] to all enemies stood in it.

"Each of you shall pay the final sum! Cry for mercy; the reckoning has come!"