Hellspawn Staff is the 21st most-used weapon under the current filters (1.4% of 1,103,412 recorded fights), winning 69.4% overall - 3.9% of its wins come against better-geared opponents.
Best against Divine Staff (100.0%), Great Holy Staff (98.8%), Ironroot Staff (96.6%). Struggles against Bow (38.8%), Dawnsong (44.8%), Prowling Staff (47.6%).
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.