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

Genuine Serrakura
Scale of Bitter Spoil
Cloak of the Dark Reservoir
Mantle of the Whispered Bond of the Crimson Witness
Wide Angle
Unusual Jin and Yin Fox Spirits
Masque of Awaleb
Genuine Silent Wake of the Crimson Witness
Genuine Bloodfeather Wings
Hood of the Infernal Maw
Inscribed Shatterblast Crown
Golden Piscean Pulverizer
International 2019 Cursor Pack
Golden Infernal Chieftain
Double Vision
Hakobi and Tenneko
Beaver Knight
Naked Greevil
Beaks n' Bubbles
Prismatic Drake
Eye of Avernus
Provocation of Ruin Belt
Dancer of the Spiteful Eyes
Radiant Conqueror Shoulder
Genuine Flopjaw the Boxhound 