Hellspawn Staff is the 21st most-used weapon under the current filters (1.4% of 1,212,775 recorded fights), winning 69.5% overall - 3.9% of its wins come against better-geared opponents.
Best against Divine Staff (100.0%), Great Holy Staff (96.8%), Ironroot Staff (96.8%). Struggles against Bow (41.4%), Dawnsong (47.2%), Prowling Staff (47.7%).
Winrate by IP difference (50-IP buckets, dot size = sample size). A flat curve means the weapon carries regardless of gear; a steep one means it only wins when out-gearing.