Medzo's Crossbow

Alter: This corssbow once belonged to a savage gambler. Scoring a critical hit with this magic weapon doesn't double the weapon's damage dice, and when you roll a 1 on an attack roll with it, the weapon jams and cannot be used again until the end of your next turn.

A target hit with a ranged attack from this crossbow takes 3d4 damage, instead of its normal damage. When you hit with an attack using this weapon and roll 3 of the same number on the attack die, use the matching number to determine what effect occurs using the table. When this happens, the target takes an extra 1d6 piercing damage.

Attunement: No
Rarity: Rare
Type: Hand Crossbow
Cost: 1395gp

Griffons Saddlebag, Vol II

Edit: in exchange for not being able to crit, on a nat 20 the player (or DM on a nat 1) pulls 3 cards from the Luck Deck, and selects one. it must be used before the players next turn. in world as a sort of " the attack was helpful, allowing X to get a better hit", or "missing the blow causes you to stumble into X, knocking their attack off a little"

Matching Number	Effect
1	You can reroll one of the weapon's damage dice, even if it was a matching number. You must use the new roll.
2	The next attack roll made against the target before the end of your next turn has advantage.
3	The target has disadvantage on attack rolls it makes until the end of your next turn.
4	If the target is a hostile creature, 30gp spills from it at your feet.