The best cursed item is one where an inventive player can use the curse to their advantage.
When designing the first of these swords, I tried to think of combos players can use to take advantage of it. Some of the later swords were just used to fit into the theme of "cursed".
Naegling can be used to sacrifice
's defensive shields for more damage done, as well as PC.
Dainslef synergizes with vampire and nightmare, the healing aspects of
.
Gram synergizes with purify, and provides an option for a faster rush weapon for
. Arsenic takes a few turns to build up damage.
Durendal is designed to deal damage while being defensive.
is about defense.
Hrunting is just random.
Laevateinn with EA
Domacles for gravity stalls. Gravity is quite a good element for stalling, but doesn't have much offense. Also combos with EA.
Kusanagi just eats up
and deals damage. It should be an offensive weapon for life that perhaps fits a midrange hitter role that gets less effective as the game goes on.
Excalibur's temporary stay can be lengthened with purify to stop deckout or just renew the card. Crusaders can endow the sword during the turns before it disappears.
Joyeuse delays the user's deck, but most
users have precogs or HG
Most of the "bad" effects will be lobotomizable.