Warden's Sword as an Item of Power

[JustinS]

So from the books, I've always got the impression that the Warden Swords were not the run of the mill enchanted item.

If you were building one as an Item of Power with unlimited uses (i.e. not using the focus mechanic), how would you do it?

Ideally it would be as a net -1 Refresh item (-3 or less Power, +2 for big sword that has warden written all over it), but if it takes more for you to be satisfied with it, go for it.

[adgramaine]

Warden Swords are actually outlined in the books, YS303   

[JustinS]

Warden Swords are actually outlined in the books, YS303   

Yes, I know. Built as a special case focus item with limited uses.

I was asking if people had ideas for alternatives to the published version.

[Becq]

Warden Sword (full powers can only be accessed by a Wizard)
 
[+2] One-Time Discount
[+0] It's a Big Damn Sword (base w:3)
[+0] Unbreakable
[-1] Spell Cleaver (when casting a counterspell that the sword could "cut" through, provides power equals the control roll made at no stress cost)
[-1] Cuts Through Spells Like Butter (+2 to Discipline when using the Spell Cleaver ability)
[-1] Magic-Honed Blade (+2 shifts for damage; ie increase to w:5)

NET REFRESH COST: [-1]

I think most of this is fairly standard application of existing rules (+2 shifts for -1 refresh).  Spell Cleaver is an custom power which is a bit like have one point of armor against a very specific source of mental stress that would normally ignore armor.

I'm still wavering on the Butter power; it might be that +2 is too much.