Shadowcaller is the 60th most-used weapon under the current filters (0.6% of 304,199 recorded fights), winning 44.2% overall - 7.6% of its wins come against better-geared opponents.
Best against Hallowfall (76.0%), Holy Staff (75.0%), Boltcasters (63.6%). Struggles against Kingmaker (4.3%), Hellspawn Staff (12.8%), Battle Bracers (19.2%).
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.
