If you don't control "Embodiment of Crime", or if this card has no Xyz Material, use "Number Wall" to protect it from being destroyed by battle and card effects.
You can special summon both "Number 31: Embodiment of Punishment" and "Number 13: Embodiment of Crime" having one level 1 monster on the graveyard and having on your hand "Acorno", "Pinecono" and "Kinka-byo". Use "Acorno's" effect to summon it and a "Pinecono" in your hand. Then, Normal Summon "Kinka-byo" to resurrect the Level 1 monster already in the graveyard, then xyz summon both "Numbers".
One can perform a cleaner version of this summon by Xyz summoning either "Crime" or "Punishment" with the "Acorno"/"Pinecono" combo; then using its effect to send one of its materials to the graveyard; summoning THAT monster with "Kinka-byo." While you lose one Xyz material that could be used for an effect activation, you gain two indestructible, un-attackable monsters on the first turn, with only three cards used.
You can use an "An Unfortunate Report" with the effect of "Number 31: Embodiment of Punishment" or "Number 13: Embodiment of Crime" to double the damage your enemy takes in a single turn.
You can use "Xyz Override" to avoid detaching material from "Number 31: Embodiment of Punishment" or "Number 13: Embodiment of Crime" and use his effect¨as many times as you want.
You can use "Wolf in Sheep's Clothing" to special summon two level 1 monsters and then Xyz summon either "Crime" or "Punishment".
You can use the self-tributing effect of "Evil Thorn" to special summon two more from the deck and then Xyz summon either "Crime" or "Punishment", with 300 points of damage to the enemy as a bonus.