Ergo Sum Catalyst

Defeat targets when using Ergo Sum. While Ergo Sum is equipped, Transcendent grenade final blows provide additional progress.

Ergo SumSword · Energy weapon

Unlock

Defeat targets when using Ergo Sum. While Ergo Sum is equipped, Transcendent grenade final blows provide additional progress.

Targets defeated500

What it does

Dealing damage with a Transcendent grenade grants Ergo Sum ammo.

How to get the catalyst

Acquired from completing "Excision" on Grandmaster.

Weapon source: Exploring the Pale Heart