Delta Blade

Requires a free hand.
A three-piece weapon consisting of a shortsword
and two scimitars. When you hit a creature with
one of the weapons, it gains up to +1 to attack and
damage as it charges. A charged weapon may fuse
with another charged weapon. When you hit a
creature with a fused weapon it deals the
combined damage of fused weapons and expends
a charge. Once all charges are spent from a fused weapon the individual weapons are able to detach.