Abilities

Spooky Pop 
Super: Swing his mace, dealing 2 damage, stunning and knocking back nearby enemies
Max 4 damage, 2s stun

Spooky Pop 
Super: Swing his mace, dealing 2 damage, stunning and knocking back nearby enemies
Max 4 damage, 2s stun
+1 damage
Lvl 1+1s stun
Lvl 6+1 damage
Lvl 11

I am back! 
Boast: Gain 1 Soul, Revive: come back to battle with 6 HP plus 2 HP per Soul
Max 4 HP and 2 energy per soul

I am back! 
Boast: Gain 1 Soul, Revive: come back to battle with 6 HP plus 2 HP per Soul
Max 4 HP and 2 energy per soul
+2 Energy per soul
Lvl 2+1 HP per soul
Lvl 7+1 HP per soul
Lvl 12

How dare you! 
Attacks deal 1 bonus damage to Isolated enemies
Max 2 damage, 2 energy

How dare you! 
Attacks deal 1 bonus damage to Isolated enemies
Max 2 damage, 2 energy
Absorbs 1 Energy
Lvl 3Absorbs 1 Energy
Lvl 8+1 extra damage
Lvl 13
Stats
HP 13
Damage per Second 1
Damage per Hit 2
Hit per Second 0.5
Energy Cost 10
Skeleton King Counters
Skeleton King is a pretty adaptive Hero so knowing how to counter him means knowing his abilities. Below level 2, keep your distance and attack from different areas of the board with tanks upfront. At level 2 or higher, use tanks and high-health minis to keep him from stealing Souls for a better revive. At level 3 or higher, you won't want to spread apart your units where they're too isolated.