Finished catalyst quest. Now the targets defeated part progress not counting properly, 100 kills= 0 % so need ? kills.... it seem to go up if freeze targets, and kill with with other weapons? it says "Defeat targets using this weapon to unlock this upgrade" I did that and nothing ... whatever, guess it will get taken care of at some point..
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To progress the catalyst kills equip Cryosthesia, but get kills with the weapon in your secondary/energy slot. Cryo is the first D2 energy weapon that takes primary ammo in the kinetic slot and the game seems confused by it. So it can be tricked by getting kills with a weapon in your energy slot.