Weapon evolves by earning points. Any match won using Phantom Assassin will earn you 1 point. Earning 40 points will upgrade the weapon to Level 2, and earning 100 points causes the weapon to reach its maximum evolution.
Hero
Phantom Assassin
Slot
Weapon
Rarity
Arcana

Inscribed Demon Eater
Legacy of the Eldwurm Crest
Wibbley
Taunt: Keep an Ear Out
Jujak the Fiery Rebirth
Auspicious Cluckles the Brave
Origin of the Unmaking
Taunt: All Sparkles n' Rainbows
Magus Accord
Inscribed Blades of Voth Domosh
Fractal Horns of Inner Abysm 