- Give the Ascended Calibur and the Leviathan Blade a cyan energy field, like the one in this promotional image. The field is purely aesthetic and would not affect the damage values or speed of the sword.
http://media.spiralknights.com/v/20150615141246/images/wallpaper/knight/...

The Cold Iron Vanquisher and Cold Iron Carver get Haunted Auras instead.

- 5-star addition to the Spur line: Winfinity.
Retains the basic mechanics of the Spur swords, with 4 or 5 more bars of normal damage than the Winmillion, up to the developers to decide the damage increase really.

- Wrench Wand line extension:
3* Striking Spanner
4* ???
5* ???
New Wrench Wand mechanic: When the charge attack hits a monster, a temporary healing field is projected onto the floor. The radius , healing factor, and duration of the field increases with the star level. Respawning monsters, mini monsters (Jelly Minis, Scarabs, Dust Bunnies, Glop Drops, etc.), destructible blocks, and walls do not trigger the field.

I'll probably think of some more ideas and fill in the missing 4* and 5* Wrench Wand names when I get more sleep. Until then, feedback would be appreciated.