Ghostflame is a unique Legend Spike from Diablo II: Lord of Destruction.
Ghostflame deals a very good amount of damage through its added Magic Damage; since not many enemies, even in Hell difficulty, are immune to Magic Damage, Ghostflame generally is consistently effective, no matter what the difficulty level.
Stats[]

Ghostflame
Legend Spike
One-Hand Damage: (133-156) to (203-238)
Required Level: 66
Required Strength: 55
Required Dexterity: 57
Dagger Class - Fast Attack Speed
+190-240% Enhanced Damage
Ignore Target's Defense
+108 Magic Damage
10-15% Mana Stolen Per Hit
+2 To Light Radius
Indestructible
Ethereal (Cannot Be Repaired)
(Spawns In Patch 1.10 Only)
Normal Daggers — Gull (Dagger) • The Diggler (Dirk) • The Jade Tan Do (Kris) • Spectral Shard (Blade)
Exceptional Daggers — Spineripper (Poignard) • Heart Carver (Rondel) • Blackbog's Sharp (Cinquedeas) • Stormspike (Stiletto)
Elite Daggers — Wizardspike (Bone Knife) • Fleshripper (Fanged Knife) • Ghostflame (Legend Spike)
Quest Items — The Gidbinn