So there's like a million ways they could work but I thought of a good one-

Charge

Time: Lengthy, think haze bomb or even gran faust
Effect: Become invisible! Just like maskeraith but on demand!
When it wears off: Recon mark all of the enemies in a short radius.

Normal hits

Hit one if cloaked: Divine avenger's first swing
Hit one if not cloaked: Throw a saw blade
Hit two: Divine avenger's finishing blow

Why it's good

Because it's basically the coolest thing ever.

Unbalanced? I'm sure you could find a ton to tweak about it, like damage, charge time, adding or subtracting split damage on certain hits, the length of the invisibility.. stuff like that. I'm imagining this as being a normal weapon as well.. why? Because it recon marks them. If it didn't do that then it could be elemental etc. fairly easier.