thanatos very good arena build (only 4 pros

Thanatos flings his scythe at an enemy, dealing damage and an additional 10% of the target's maximum health against enemy gods. Enemies hit are slowed for 3s and heal Thanatos based on damage dealt. Consumes 4% of Thanatos' current HP when used.

Ability Type: Projectile
Damage: 100 / 170 / 240 / 310 / 380 (+60% of your Physical Power)
Bonus Damage (Gods): 10% of Max HP
Healing: 50% of damage dealt
Slow: 20%
Cost: 25 / 35 / 45 / 55 / 65
Cooldown: 12s

Thanatos senses death, gaining immunity to Slow effects and additional move speed and Physical Penetration for 6s. His speed bonus increases up to double when moving toward an enemy god within the instant kill health threshold of his Ultimate. Consumes 4% of Thanatos' current HP when used.

Ability Type: Buff
Penetration: 10 / 15 / 20 / 25 / 30
Move Speed: 10 / 15 / 20 / 25 / 30%
Bonus Speed (Low Health): 10 / 15 / 20 / 25 / 30%
Cost: 20 / 25 / 30 / 35 / 40
Cooldown: 13s

Thanatos swings his scythe, dealing Physical damage and Silencing enemies he hits. Thanatos moves at a reduced rate while swinging. Consumes 4% of Thanatos' current HP when used.

Ability Type: Cone, Silence, Damage
Damage: 100 / 150 / 200 / 250 / 300 (+70% of your Physical Power)
Silence Duration: 1s
Cost: 25 / 30 / 35 / 40 / 45
Cooldown: 14s

Thanatos flaps his wings and ascends for 5s, unable to be hit. While airborne, he moves unimpeded at an increased speed before diving to his target location, dealing damage. Enemies below a Health threshold are instantly killed. All others are Stunned. Consumes 8% of Thanatos' current HP when used.

Ability Type: Circle, Stun, Damage
Damage: 110 / 145 / 180 / 215 / 250 (+80% of your Physical Power)
Kill Health Threshold: 24 / 28 / 32 / 36 / 40%
Stun Duration: 1.5s
Bonus Move Speed: 150%
Radius: 15
Cost: 40 / 50 / 60 / 70 / 80
Cooldown: 90s