One branch is chosen on each tier.
+20 Strength.
Permanently grants +20 Strength.
Form grants speed.
During the form, keeps Speed I active, making it easier to chase and maintain melee range.
Strength gives more weapon damage.
Passive attack bonus from Strength improves to Strength*0.05 instead of Strength*0.04. This is a permanent basic-attack boost.
Attacks in form heal.
During the form, Arthas heals for 15% of damage dealt, making aggressive hits the main sustain source.
Form reduces incoming damage.
While Arthas form is active, incoming damage is reduced by 15%. This lowers the cost of staying in melee under focus.
Allies gain part of form power.
While the form is active, nearby allies gain 20% of Arthas form bonuses. Useful for group pushes.
Endurance extends the form.
Form duration becomes 35s + Endurance/12. Higher Endurance means a longer enhanced-damage window.
Kills extend the form.
Killing any target during the form heals Arthas for 4% max HP + Strength/5000, extends the form by 2s, and helps continue the chain.
Heavy form fighter: Strength improves basic attacks, and the temporary form massively increases melee damage. The form deals no self-damage.
