Abilities

Iron Fist 
Super: 2X ATK to allies in an area for 3s
Max 5s, all allies

Iron Fist 
Super: 2X ATK to allies in an area for 3s
Max 5s, all allies
+1s
Lvl 1To all allies
Lvl 6+1s
Lvl 11

Determination 
Heal 4 HP every 5 hits
Max 8 HP, 4 hit

Determination 
Heal 4 HP every 5 hits
Max 8 HP, 4 hit
-1 hit
Lvl 2Heal 2 HP
Lvl 7Heal 2 HP
Lvl 12

Invincibility 
Gain Invulnerable and Unstoppable for 1.5s at 1 HP (1/round)
Max 3s

Invincibility 
Gain Invulnerable and Unstoppable for 1.5s at 1 HP (1/round)
Max 3s
+0.5s
Lvl 3+0.5s
Lvl 8+0.5s
Lvl 13
Stats
HP 20
DPS 1.4
Attack 2
Hit Speed 0.7
Energy Cost 10
Barbarian King Counters
Barbarian King is often in the front trying to push as fast as possible. Utilizing characters that deal damage when KO'd or have a chance to crit while attacking is smart to try and take him out quickly. It's also important to use ranged and anti-healing units to reduce his healing powers.