Doppelganger is a Demon MVP, meaning that Guardian path characters gain points for killing it.
It is respawned every 10 minutes in Bossnia [Lv:1].
Card
Item ID: 4142
Name: Doppelganger Card
Description: Enable faster Attack Speed so long as the weapon to which this card is compounded is equipped.
Compounded On: Weapon
Drop Rate: 10.00%