Sliver of Decrepitude

Those touched by this blade find themselves aging unnaturally fast.
Pick one of the bearer's melee weapons to be a
Sliver of Decrepitude. Allocate wounds inflicted
by that weapon before allocating wounds
inflicted by any other attacks made by the bearer.
If 1 or more wounds by that weapon are inflicted
on an enemy HERO or MONSTER, subtract 2"
from that HERO or MONSTER's Move
characteristic for the rest of the battle.