Warlock Skills on non-daggers

I found a rare

Great Sword or a

Claymore, can’t remember which base, while running normal difficulty that has +1 Eldritch skills.
I knew that daggers got the warlock specific + skills but was unaware of other weapon types.
I haven’t found any swords with + warlock skills since.
I was wondering if it is common, obviously its possible, but I really like the sword and don’t want to go back to daggers.

That's cause your sword had a prefix which grants a bonus to an entire Skill Tree (Eldritch), vs staffmods (+ to invididual skills) on daggers. I.e. it was a magic sword with a prefix. A magic

Dagger could have had that too, but any base/magic/rare

Dagger can have + to individual warlock skills, even base daggers.

To quote Trang Oul from another thread:

Trang Oul wrote: 11 hours ago

If I interpret data files correctly:

suffixes:

• of Miasma Bolt (charges) - polearms, daggers, voodoo heads; swords
• of Lethargy (charges) - polearms, daggers, voodoo heads; rings, circlets
• of Rancor (charges) - polearms, daggers, voodoo heads; shields (only non-class or grimoires, excluding auric shields?)
• of Apocalypse (charges) - staves, daggers, voodoo heads; gloves

prefixes:

• Chaotic/Erratic/Torrid (+ 1/2/3 to Chaos) - daggers (also throwing knives), grimoires, amulets, circlets; +3 only on magic items
• Sullied/Tainted/Forbidden (+ 1/2/3 to Eldritch) - daggers (excluding throwing knives), grimoires, amulets, circlets, swords; +3 only on magic items
• Fiendish/Dreadful/Malevolent (+1/2/3 to Demon) - daggers (also throwing knives), grimoires, amulets, circlets; +3 only on magic items
• Chaotic/Sullied/Fiendish (+1 to Chaos/Eldritch/Demon) - grand charms (read: skillers)
• Devil's/Arch-Devil's (+1/2 to Warlock Skills) - amulets, circlets; daggers, grimoires; +2 only on magic items

So your swords were "Sullied/

Tainted/Forbidden ...", which grants +1/2/3 to Eldritch skills. It can appear on swords (as well as circlets, daggers, grimoires, and amulets).

I just got home. Here is the sword. I put an

Ort and a +5% ed jewel in it.