Around the area where you get the quest, there are friendly souls floating around called "Willing Soul". Just stand near them and use the sword to absorb them & charge the blade.
Quest
The Soul Blade
Quest facts and objectives from the current retail game data.
The highest voted Wowhead comments for this page. They are community notes, not TheWoWDB comments.
and just for the record, there is no runeblade as reward ;)
Doesn't break stealth.
Quest facts
The client quest POI data records no map location for this quest, so no map is shown.
Check whether you have already completed this quest
in-game: /run print(C_QuestLog.IsQuestFlaggedCompleted(63945))
Description
The runeblade of a Necrolord can be a potent weapon in this realm. An abundance of souls are willing to contribute their anima to end their own suffering and bring defeat to the Jailer. Take one of my runeblades and charge it with the anima of the willing souls you find here. Once charged, use it lay waste to their forces here.
Community notes from Wowhead · 4 comments
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Reward details
Reputation: The Undying Army +125
Long ago, the Primus established the five houses of Maldraxxus to build the ultimate fighting force. Through might, cleverness, and guile, this unyielding armada is pledged to defend the Shadowlands against all threats.
Reputation group: Shadowlands.
Item facts are the current retail client’s (ItemSparse); the specialisations for a pick-one item are the ones the Blizzard quest API lists; faction and currency text is the client’s own. Lowest listed price = the US commodity auction house now.
Where this quest fits
Also counted by Rooting Out the Evil
Its criteria name 10 quests; others include:
- A Shady Place
- Heavy-Handed Tactics
- Clean Out the Crucible
- Looming Darkness
- No Soul Left Behind
- Snail Stomping
- Just Don't Ask Me to Spell It
- Double Dromans
Steps, storylines and map placement from the client’s QuestLine, prerequisite and QuestPOI data; neighbouring quest text is Blizzard’s own (quest API), shortened to its opening sentences.
Achievements
Completing this quest counts toward this achievement.
- Rooting Out the Evil: its criteria name 10 quests, this one included.