
Equipped creature gets +1/+0 and has "Whenever this creature attacks, you may sacrifice Spare Dagger. When you do, this creature deals 1 damage to any target."
Equip (
: Attach to target creature you control. Equip only as a sorcery.)
Illustrated by Khurrum · Adventures in the Forgotten Realms · #250
There are no rulings for Spare Dagger.