Unnatural Brass Knuckles

Equip {3}, Equip {1} for creatures with shadow
Equipped creature has +1/0.
If equipped creature has full or partial unblockablility, it has double strike and 0/+1.
"Your speed does not matter, your strength does not
matter, this fight is over, you just haven't given up
yet. Sooner or later you will break."
—Shadowhide, travelling nightelemental