Spell ยท Physical added
Hissing Serum
Hissing Serum is a new Use effect of a Quest item in WoW Forever that does not exist in Classic Era. Its tooltip reads: "Inject Hissing Serum into the system above Othmar's body." 5 sec cast. The client lists that item without its name or tooltip.
Hissing Serum tooltip in WoW Forever
New in Forever. There is no Classic Era record to compare.
Forever Oct 22, 2026
Hissing Serum
5 sec cast
Inject Hissing Serum into the system above Othmar's body.
Hissing Serum changes between Forever builds
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In the Sep 24, 2026 build (vs Sep 23, 2026): changed tooltip text added: "Inject Hissing Serum into the system above Othmar's body."
See every added record in the Oct 22, 2026 build →
Questions about Hissing Serum
Is Hissing Serum new in WoW Forever?
Yes. Hissing Serum is a new spell in WoW Forever that does not exist in Classic Era.
What does Hissing Serum do in WoW Forever?
The Hissing Serum tooltip reads: "Inject Hissing Serum into the system above Othmar's body."
Read from the Oct 22, 2026 build (1.60.1.70532), compared against Classic Era Oct 27, 2026 (1.15.9.70576) ·synced Oct 27, 2026 · how we read this → · report a wrong value