Mythras Weave: Dualform Weapon

Two weapons of size L or smaller (or items roughly equivalent in size). 3 rune slots from each weapon. 1200 sv worth of liquid mercury and harmony weft skeins. Command words decided during construction.

14 days

Free action, once per cycle, command word spoken aloud by the wielder (one command word per form)

The existing weapons fuse into one new weapon. The new weapon can pick its form from either of the existing weapons as a free action, once per cycle. The new weapon cannot mix the two forms into something new, it can just switch from one of the existing weapons to the other. Existing weaves on the items are maintained. The different forms have separate HP and AP, but if either form is destroyed the weapon as a whole (including other forms) is destroyed.

More advanced forms of this could combine even more weapons to have more forms available. Alternatively, a weave on one weapon could apply to the other weapons, or the weapon could switch forms as often as the user wanted. Extreme variations could share weaves from one weapon to all the weapons or allow new forms that combine the existing weapons at the same time.