If you want this to get into the Crucible, change the card text to "Weapon: deal 1 damage at the end of every turn. Stacks on existing weapon.".
As you can see, I added a little suggestion. Since you want it to add extra damage to your original weapon, I suggest it should just stack on an existing weapon. You'd need to play a normal weapon first and then you can start using gloves. The trick: it will not only add damage, but will act like a one-time PA which can stack.
What do you think?