Darksiders II
50 Achievements
1,000
40-50h
Feeding Time
Level Up Your 1st Possessed Weapon
20
How to unlock the Feeding Time achievement in Darksiders II - Definitive Guide
Once you have a possessed item, you have to "feed" it to Level it up. This is done by sacrificing other items to the possessed weapon, destroying those items in the process.
You can accomplish this by clicking A on the possessed weapon and selecting "Upgrade". Once you sacrifice enough items to level the weapon, the achievement will unlock. Note that different items have different values that apply to leveling an item (as indicated by the level bar which appears to the right of the item on the upgrade screen).
Once you got one you can Press A and Upgrade this Weapon by sacrificing any Item (besides Quest Items and Potions). The more powerful the scarified items is, the quicker the Possessed Weapon gets the Upgrade
Despite what the trophy description says you do not need to level up the first possessed weapon that you find. You simply need to level up any possessed weapon one level. To do this you must select it with and choose the "Upgrade" option. From there you choose the item(s) that you want to sacrifice (feed) it. The better the item, the more it will level up.
You can see the experience progression bar at the top right, as well as how many levels it has. The levels are represented by skulls, so the maximum level you can raise it by is 5. Feed it until it reaches level 2 and your trophy will unlock.
For additional help and information on making the best possessed weapon's in the game, please refer to the Possessed Weapon Guide.